Did his cleaner mislead him? (7)
I believe the answer is:
charlie
'him?' is the definition.
'did his cleaner mislead' is the wordplay.
I cannot really see how this works, but
'cleaner' could be 'char' (char can mean a cleaner) and 'char' is present in the answer.
'mislead' could be 'lie' (to lie to someone is to mislead them) and 'lie' is present in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for charlie that I've seen before include "tail-ender" , "Chaplinesque man" , "Fool; C (radio comms)" , "Cocaine (colloq.), fool (colloq.)" , "Code word < for silly fellow" .)