Party's travails (7)
I believe the answer is:
labours
'party's travails' is the definition.
'labours' can be an answer for 'travails' (travails are labours or difficult efforts). I'm unsure of the 'party's' bit.
'party's travails' is the wordplay.
'party' becomes 'labour' (Labour Party is an example).
'travails' becomes 's' (I can't explain this - if you can you should believe this answer much more).
'labour'+'s'='LABOURS'
Can you help me to learn more?
(Other definitions for labours that I've seen before include "Shakespeare: 'Love's . . . . . . . Lost'" , "Hercules had twelve" , "Works hard and makes great efforts" , "Some work" , "Overemphasises" .)