Being an unusual occupation, there's a man specially for it (3,3)
I believe the answer is:
odd job
'being an unusual occupation there's a man specially for it' is the definition.
I can't judge whether this definition defines the answer.
'unusual occupation there's a man specially for it' is the wordplay.
I cannot really understand how this works, but
'unusual' could be 'odd' (similar in meaning) and 'odd' is found within the answer.
'occupation' could be 'job' (job is a kind of occupation) and 'job' is found in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for odd job that I've seen before include "Part-time" , "little work" , "villainous sidekick" , "Casual work (for Goldfinger's minder?)" , "Occasional piece of work" .)