Provide with pictures from artist in US, little altered (10)
I believe the answer is:
illustrate
'provide with pictures' is the definition.
(I've seen this before)
'artist in us little altered' is the wordplay.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'in' means one lot of letters goes inside another.
'altered' indicates an anagram.
'us'+'little'='uslittle'
'uslittle' is an anagram of 'illustte'.
'ra' placed inside 'illustte' is 'ILLUSTRATE'.
'from' acts as a link.
(Other definitions for illustrate that I've seen before include "Exemplify" , "Provide with pictures" , "picture" , "Ornament" , "Give as example" .)