Picture earl with flies undone (6)
I believe the answer is:
selfie
'picture' is the definition.
(I know that selfie is a type of picture)
'earl with flies undone' is the wordplay.
'earl' becomes 'e'.
'with' is a charade indicator (letters next to each other).
'undone' is an anagram indicator.
'flies' with letters rearranged gives 'selfi'.
'e' put after 'selfi' is 'SELFIE'.
(Other definitions for selfie that I've seen before include "21 [PHOTO]" , "Personal photo" .)