College that in Paris is without a match (6)
I believe the answer is:
unique
'is without a match' is the definition.
'college that in paris' is the wordplay.
'college' becomes 'uni' (short for university).
'that in paris' becomes 'que' (French for 'that').
'uni'+'que'='UNIQUE'
(Other definitions for unique that I've seen before include "One-off" , "incomparable" , "Being the only example" , "Singular, different from others" , "Without equal or like" .)