Chap in the hospital forecourt (3)
I believe the answer is:
alf
'chap' is the definition.
'in the hospital forecourt' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ALF' is hidden within 'the hospital forecourt'.
(Other definitions for alf that I've seen before include "Boy" , "Chap" , "Garnett or Ramsey?" , "Mr Garnett" , "-- Garnett, bigoted TV?character" .)