Feeble man gets a lot out of work (7)
I believe the answer is:
milksop
'feeble man gets a' is the definition.
I can't judge whether this defines the answer.
'lot out of work' is the wordplay.
'lot' becomes 'm'.
'out of' becomes 'ilks' (I can't justify this - if you can you should believe this answer much more).
'work' becomes 'op' (common abbreviation for 'opus').
'm'+'ilks'+'op'='MILKSOP'
Can you help me to learn more?
(Other definitions for milksop that I've seen before include "Cissy, fond of a pinta?" , "Doormat" , "Cissy (informal) -- limps OK (anag)" , "Weed" , "Feeble ineffectual man" .)