Turner is delayed outside hospital (5)
I believe the answer is:
lathe
'turner' is the definition.
(a lathe is something which 'turns')
'delayed outside hospital' is the wordplay.
'delayed' becomes 'late' (running late).
'outside' means one lot of letters goes inside another (some letters go outside others).
'hospital' becomes 'H' (abbreviation for hospital on maps).
'late' placed around 'h' is 'LATHE'.
'is' is the link.
(Other definitions for lathe that I've seen before include "Turning device" , "Revolver" , "piece of machinery" , "Means for turning" , "Machine tool for shaping metal or wood" .)