However well paid, he's still short (3)
I believe the answer is:
pro
'however well paid' is the definition.
'pro' can be an answer for 'paid' (I've seen this in other clues). I am unsure of the 'however well' bit.
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for pro that I've seen before include "Competent person" , "Golf expert" , "Athelete who plays for pay" , "Professional; advantage" , "Of argument, say, in favour of" .)