It may get a lift when you come in (5)
I believe the answer is:
latch
'it may get a lift when you come in' is the definition.
The definition suggests a singular noun which matches the answer.
This is all the clue.
Can you help me to learn more?
(Other definitions for latch that I've seen before include "Door-catch" , "Device for opening door" , "retainer" , "Door-fastening" , "Gate fastener" .)