Part of one qualifying match (5)
I believe the answer is:
equal
'match' is the definition.
(I know that match can be written as equal)
'part of one qualifying' is the wordplay.
'part of' says the answer is hidden in the clue.
'EQUAL' is hidden within 'one qualifying'.
(Other definitions for equal that I've seen before include "Commensurate" , "Alike" , "The same; fairly balanced" , "On a par" , "Equivalent or equitable" .)