Illustrated by tailor using small photo (9)
I believe the answer is:
pictorial
'illustrated' is the definition.
(similar in meaning)
'by tailor using small photo' is the wordplay.
'by' is a charade indicator (letters next to each other).
'using' indicates an anagram (the letters used in a different way).
'small photo' becomes 'pic' (short for picture; 'small' indicates an abbreviation).
'tailor' is an anagram of 'torial'.
'torial' put after 'pic' is 'PICTORIAL'.
(Other definitions for pictorial that I've seen before include "Clip a riot (anag) - graphic" , "Magazine" , "Illustrated" , "in photographs" .)