The price of a suit (5)
I believe the answer is:
costs
'the price of a suit' is the definition.
I can't judge whether this definition defines the answer.
'the' is the wordplay.
I cannot really understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found in the answer.
The remaining letters 'coss' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for costs that I've seen before include "Expenditure" , "Is priced at" , "is expensive" , "prices" , "Fees" .)