No pay, no work? No! (3)
I believe the answer is:
nay
'no' is the definition.
(I've seen this before)
'no pay no work?' is the wordplay.
'no' indicates named letters should be taken away.
'work?' becomes 'op' (common abbreviation for 'opus').
'no'+'pay'='nopay'
'nopay' with 'op' taken out is 'NAY'.
(Other definitions for nay that I've seen before include "Archaic negative" , "Indeed" , "No - a negative vote" , "Negative answer" , "telling a nicker from a pony?" .)