Small male in tradesperson's vehicle (6)
I believe the answer is:
minute
'small' is the definition.
(similar in meaning)
'male in tradesperson's vehicle' is the wordplay.
I cannot really see how this works, but
'male' could be 'm' (common abbreviation) and 'm' is found in the answer.
'in' is found in the answer.
'vehicle' could be 'ute' (Australian abbreviation for utility vehicle) and 'ute' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for minute that I've seen before include "Tiny; period of time" , "Tiny; written note" , "Little -- 60 18 across" , "Very small, like unit of time" , "official memorandum" .)