Commercial centre in race for details on contract (5,5)
I believe the answer is:
small print
'details on contract' is the definition.
(a contract might have details in small print)
'commercial centre in race' is the wordplay.
'commercial centre' becomes 'mall' (shopping mall).
'in' is an insertion indicator.
'race' becomes 'sprint' (I've seen this before).
'mall' going within 'sprint' is 'SMALL PRINT'.
'for' is the link.
(Other definitions for small print that I've seen before include "You may regret not reading this!" , "Be careful to read this" , "Words often ignored" , "A trap for the unwary consumer" , "Obscure terms" .)