Some task I'm prepared to economise (5)
I believe the answer is:
skimp
'economise' is the definition.
(I've seen this before)
'some task i'm prepared' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'SKIMP' is hidden within 'task im prepared'.
'to' acts as a link.
(Other definitions for skimp that I've seen before include "Be sparing" , "Be mean towards" , "Expend less in an attempt to economise" , "tighten one's belt" , "Spend little" .)