One recruits new petrol attendants after dismissing Dan (6,7)
I believe the answer is:
talent spotter
'one recruits' is the definition.
(a talent spotter recruits new talent)
'new petrol attendants after dismissing dan' is the wordplay.
'new' indicates an anagram.
'after dismissing' indicates named letters should be taken away.
'petrol'+'attendants'='petrolattendants'
'petrolattendants' with 'dan' taken away is 'petrolattents'.
'petrolattents' anagrammed gives 'TALENT-SPOTTER'.
(Other definitions for talent spotter that I've seen before include "Agent looking for the gifted" , "Show business scout" , "One looking for good new performers" .)