He brings gifts round that woman's -- its charm's in refinement (6,9)
I believe the answer is:
father christmas
'he brings gifts' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'round that woman's its charm's in refinement' is the wordplay.
I cannot really understand how this works, but
'round' could be 'fat' (I've seen this in other clues) and 'fat' is found within the answer.
'woman's' could be 'her' (belonging to a woman) and 'her' is located in the answer.
an anagram of 'its' is 'ist' which is located in the answer.
an anagram of 'charm' is 'chrma' which is located in the left over letters.
A single letter 's' remains 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 father christmas that I've seen before include "late December he's busy" , "Santa!" , "man with gifts" , "he'll be sacked" , "present supremo" .)