Drug dealer ignoring first court official (5)
I believe the answer is:
usher
'court official' is the definition.
(official in a law court)
'drug dealer ignoring first' is the wordplay.
'drug dealer' becomes 'pusher' (someone who sells or pushes drugs).
'ignoring first' means to remove the first letter.
'pusher' with its initial letter taken away is 'USHER'.
(Other definitions for usher that I've seen before include "may be match participant" , "Helper at wedding" , "falling house" , "Show in - escort" , "Introduce" .)