Manly Scot with no use for a house (5)
I believe the answer is:
macho
'manly' is the definition.
(I've seen this in another clue)
'scot with no use for a house' is the wordplay.
I cannot really see how this works, but
'scot' could be 'mac' (many Scottish surnames begin with Mac) and 'mac' is found in the answer.
'no' could be 'o' (O resembles 0) and 'o' is located in the answer.
'house' could be 'h' and 'h' is found within the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for macho that I've seen before include "Laddish" , "Spiny lobster" , "Exaggeratedly masculine" , "Ostentatiously virile" , "Ramboesque" .)