Crossword Genius

Listen for the funny word in it: "travail" (4,4)

Ross

I believe the answer is:

hard work

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'travail' is the definition.
(synonyms)

'listen for the funny word in it' is the wordplay.
'listen for' becomes 'hark' (I can't justify this - if you can you should give a lot more credence to this answer).
'the funny' indicates an anagram.
'in it' is an insertion indicator.
'word' anagrammed gives 'dwor'.
'hark' going around 'dwor' is 'HARD WORK'.

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