One male attitude that's put on (6)
I believe the answer is:
impose
'put on' is the definition.
(thesaurus)
'one male attitude' is the wordplay.
I cannot really see how this works, but
'one' could be 'i' (Roman numeral) and 'i' is located in the answer.
'male' could be 'm' (common abbreviation) and 'm' is located in the answer.
'attitude' could be 'pose' (attitude can mean a pose or stance) and 'pose' is found in the answer.
No letters remain.
This explanation may well be incorrect...
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for impose that I've seen before include "Intrude or inflict upon" , "Force on others" , "Put burden or tax on" , "Put on, tax or obligation" , "Exact or levy, say tax" .)