Refinement of sculptor's head in gallery (5)
I believe the answer is:
taste
'refinement' is the definition.
(I've seen this before)
'sculptor's head in gallery' is the subsidiary indication.
'head' indicates taking the first letters.
'in' means one lot of letters goes inside another.
'gallery' becomes 'tate'.
The initial letter of 'sculptors' is 's'.
's' inserted into 'tate' is 'taste'.
'of' is the link.
(Other definitions for taste that I've seen before include "Little bit" , "One of the senses" , "Liking (for)" , "Impression from food" , "Sample the flavour" .)