Office workers surround drug dealers (3-7)

I believe the answer is:

pen-pushers

'office workers' is the definition.
(pen-pusher means an office worker)

'surround drug dealers' is the wordplay.
'surround' becomes 'pen' (pen can mean to enclose or surround).
'drug dealers' becomes 'pushers' (people pushing drugs).
'pen'+'pushers'='PEN-PUSHERS'

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app