Sporting mate leaves worked up -- no job's impossible for this one (4,5)
I believe the answer is:
wage slave
'worked up no job's impossible for this one' is the definition.
The definition suggests a singular noun which matches the answer.
'sporting mate leaves' is the wordplay.
I cannot really see how this works, but
an anagram of 'leaves' is 'eslave' which is located in the answer.
The remaining letters 'wag' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for wage slave that I've seen before include "Person dependent on pay packet" , "Worker" , "Person entirely dependent on income from an unpleasant job" , "Someone compelled to work in order to survive" , "Person compelled to work for pay in order to survive" .)