Persuaded a casual worker to make hay (7)
I believe the answer is:
tempted
'persuaded' is the definition.
(tempting is a kind of persuading)
'a casual worker to make hay' is the wordplay.
'a casual worker' becomes 'temp' (short-term or temporary worker).
'to make hay' becomes 'ted' (I've seen this before).
'temp'+'ted'='TEMPTED'
(Other definitions for tempted that I've seen before include "Drawn to" , "wooed" , "Invited" , "Enticed" , "Tried to seduce" .)