Is stuck in very warm lift (5)
I believe the answer is:
Here is my best explanation:
'lift' is the definition.
(hoisting is a kind of lifting)
'is stuck in very warm' is the subsidiary indication.
'stuck in' is an insertion indicator.
'very warm' becomes 'hot' (I've seen this before).
'is' going within 'hot' is 'hoist'.
(Other definitions for hoist that I've seen before include "Lifting gear", "Raise aloft", "A device for lifting", "Lift, raise", "piece of lifting gear", "Wind up", "Come down", "group of flags", "Raise or haul up, say flag" and "Raise with ropes".)