Wish fellow would take work (4)
I believe the answer is:
hope
'wish fellow' is the definition.
'hope' can be an answer for 'wish' (hoping is a kind of wishing). I am not sure about the 'fellow' bit.
'would take work' is the wordplay.
'would' becomes 'he' (I can't justify this - if you can you should give a lot more credence to this answer).
'take' is an insertion indicator.
'work' becomes 'op' (abbreviation for opus).
'he' enclosing 'op' is 'HOPE'.
Can you help me to learn more?
(Other definitions for hope that I've seen before include "One who wrote about prisoner" , "Cross your fingers" , "Bob --, US comic" , "Companion to faith and charity" , "It springs eternal, it's said" .)