Sure to find incredibly nice art (7)
I believe the answer is:
certain
'sure' is the definition.
(I know that sure can be written as certain)
'incredibly nice art' is the wordplay.
'incredibly' indicates anagramming the letters.
'nice'+'art'='niceart'
'niceart' is an anagram of 'CERTAIN'.
'to find' acts as a link.
(Other definitions for certain that I've seen before include "Absolutely sure" , "Decided" , "bound" , "Particular" , "Known beyond doubt" .)