New chap sure to buy something (8)
I believe the answer is:
purchase
'buy something' is the definition.
(I've seen this before)
'new chap sure' is the wordplay.
'new' indicates an anagram.
'chap'+'sure'='chapsure'
'chapsure' anagrammed gives 'PURCHASE'.
'to' acts as a link.
(Other definitions for purchase that I've seen before include "Firm grip" , "Acquisition" , "Procure" , "Leverage" , "become an owner" .)