He's more than a master (3)
I believe the answer is:
man
'master' is the definition.
(thesaurus)
'he's more than a' is the wordplay.
I cannot really see how this works, but
'more' could be 'm' and 'm' is located in the answer.
'a' could be 'an' and 'an' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for man that I've seen before include "-- Friday" , "Valet" , "race" , "Attendant" , "Provide with crew" .)