Sarcastic press in charge (6)
I believe the answer is:
ironic
'sarcastic' is the definition.
('ironic' can be similar in meaning to 'sarcastic')
'press in charge' is the wordplay.
'press' becomes 'iron' (ironing is a kind of pressing).
'in charge' becomes 'ic'.
'iron'+'ic'='IRONIC'
(Other definitions for ironic that I've seen before include "Conveying meaning by saying its opposite" , "Being sarcastic or deliberately oblique" , "Cruelly funny" , "Perverse or sarcastic in expressing opinion (6)" , "A form of sarcasm, may sound perverse" .)