Flies ruined English picture (6)
I believe the answer is:
selfie
'picture' is the definition.
(I know that selfie is a type of picture)
'flies ruined english' is the wordplay.
'ruined' is an anagram indicator.
'english' becomes 'E' (abbreviation).
'flies' anagrammed gives 'selfi'.
'selfi'+'e'='SELFIE'
(Other definitions for selfie that I've seen before include "21 [PHOTO]" , "Personal photo" .)