At work, he has his own lift (7)
I believe the answer is:
fireman
'his own lift' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'at work he' is the wordplay.
'at' says to put letters next to each other.
'work' becomes 'man' (man can mean to work or operate (e.g.) a machine).
'he' becomes 'fire' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'man' put after 'fire' is 'FIREMAN'.
'has' is the link.
Can you help me to learn more?
(Other definitions for fireman that I've seen before include "Locomotive stoker" , "Steam engine worker" , "Railway driver's assistant" , "Fighter of blaze" , "Emergency services worker" .)