One garment too many? (8)
I believe the answer is:
overcoat
'one' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'garment too many?' is the wordplay.
I cannot quite see how this works, but
'garment' could be 'coat' (coat is a kind of garment) and 'coat' is found within the answer.
'too many?' could be 'over' (I've seen this in other clues) and 'over' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for overcoat that I've seen before include "Maybe Ulster" , "Heavy outer garment" , "warmer" , "Outerwear" , "Outdoor garment" .)