Reprimanding two females after revealing nothing (7,3)
I believe the answer is:
telling off
'reprimanding' is the definition.
(telling off is a kind of reprimanding)
'two females after revealing nothing' is the wordplay.
'two females' becomes 'ff' (an abbreviation for female written twice).
'after' is a charade indicator (letters next to each other).
'revealing' becomes 'telling' (telling is a kind of revealing).
'nothing' becomes 'O' (O resembles 0).
'telling'+'o'='tellingo'
'ff' after 'tellingo' is 'TELLING-OFF'.
(Other definitions for telling off that I've seen before include "rebuke" , "reprimand" , "Cancellation of the count" .)