Expand new detail (6)
I believe the answer is:
dilate
'expand' is the definition.
(I've seen this in another clue)
'new detail' is the wordplay.
'new' indicates an anagram.
'detail' anagrammed gives 'DILATE'.
(Other definitions for dilate that I've seen before include "Get bigger" , "Enlarge - detail (anag)" , "Widen, distend" , "contract? No" , "Make wider or larger" .)