Man from drive-in restaurant turned up (5)
I believe the answer is:
ernie
'man' is the definition.
(I've seen this before)
'from drive-in restaurant turned up' is the wordplay.
'from' indicates the answer is hidden within the clue.
'turned up' shows that the letters should be reversed in order.
'einre' is hidden within 'drive in restaurant'.
'einre' back-to-front is 'ERNIE'.
(Other definitions for ernie that I've seen before include "Computer selecting Premium Bond winners" , "Wise for instance" , "Premium?bond computer" , "Machine that randomly selects Premium Bond winners" , "Wise, perhaps" .)