Reprimand traitor captured by drone (6)
I believe the answer is:
berate
'reprimand' is the definition.
(I know that reprimand can be written as berate)
'traitor captured by drone' is the wordplay.
'traitor' becomes 'rat' (rat can mean a treacherous person).
'captured by' indicates putting letters inside.
'drone' becomes 'bee' (I've seen this in another clue).
'rat' going within 'bee' is 'BERATE'.
(Other definitions for berate that I've seen before include "slate" , "Scold; angrily criticise" , "Scold or chide severely" , "Censure severely or angrily" , "Rebate (anag.)" .)