The pairs of words here are obviously alliterative, so the first letter in each line is likely important. The title "Double Duty" implies the words are providing more information than just initial letters though, so we can expect the rest of each word is also important.
The trick is to notice that each phrase seems to be an unusual transformation of a far more common alliterative pair starting with the same letter. Specifically, the transformation is to take this common phrase, convert each word to a synonym, and then convert the first letters of these synonyms back to the original phrase's initials. For example, we can see "soil sating" can be converted to "foil eating", which is itself synonymous with "sword-swallowing", a much more common phrase that also starts with S.
Since it can sometimes be difficult to hit upon the right words when replacing the initial letters of the lines given, an easier approach to solving this puzzle can be to work from both ends simultaneously - that is, think up common phrases starting with the given letter and check if it has synonyms extractable from the given line. Altogether we get the pairs:
Now we just need to extract a final answer. We obviously can't read off the first letters, since they were given to us from the start. Looking at last letters could also be an option, but many could be guessed from the original words (depending on certain inflection suffixes). So the next most natural letters to look at should be the second ones. These are bolded in the above, and can be seen to spell out two messages depending on if you're reading from the first words in each phrase or last words in each phrase. These messages respectively are WINK OR STOAT OR POLECAT and WETTERS BETWEEN SPACES.
These seem to be following the same mechanic, so translating the messages to Mink or stoat or polecat and Letters between spaces, we arrive at the alliterative phrase weasel words, which very loosely describes what we've been dealing with here (obfuscated synonyms).
|The answer is: weaselwords|