Long to ignore head and make money (4)
I believe the answer is:
earn
'make money' is the definition.
(I've seen this before)
'long to ignore head' is the wordplay.
'long' becomes 'yearn' (synonyms).
'to ignore head' means to remove the first letter (I've seen 'ignoring head' mean this).
'yearn' with its initial letter taken off is 'EARN'.
'and' is the link.
(Other definitions for earn that I've seen before include "Deserve; get paid" , "Take home" , "Acquire by ones' effort" , "Be paid for work" , "Get by working" .)