Match of some incomparable quality (5)
I believe the answer is:
equal
'match' is the definition.
(I know that match is a kind of equal)
'some incomparable quality' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'EQUAL' is hidden within 'incomparable quality'.
'of' is the link.
(Other definitions for equal that I've seen before include "Like revolting farm animals" , "Evenly-matched" , "The same in all aspects" , "The same; even" , "Keep pace with - peer" .)