If “resting”, he has nothing to cart around (5)

I believe the answer is:

actor

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'if resting he' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.

'nothing to cart around' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'around' is an anagram indicator.
'o'+'cart'='ocart'
'ocart' is an anagram of 'ACTOR'.

'has' is the link.

Can you help me to learn more?

(Other definitions for actor that I've seen before include "Dramatic artist" , "Luvvy" , "eg Anthony Hopkins" , "one to take on roles" , "I pretend" .)

I've seen this clue in the Evening Standard.

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