Garment to see on a master? (3)
I believe the answer is:
mac
'garment' is the definition.
(mac is a kind of garment)
'on a master?' is the wordplay.
'on' is an insertion indicator (as in clothing \'on\' a person).
'master?' becomes 'mc' (I can't justify this - if you can you should give a lot more credence to this answer).
'a' going inside 'mc' is 'MAC'.
'to see' acts as a link.
Can you help me to learn more?
(Other definitions for mac that I've seen before include "It may help you keep dry" , "A rainproof" , "A Gaelic son, often in name" , "Raincoat (colloq.)" , "PC" .)