Cheap clothes reserved, minimum of cash invested (7)

'invested' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'cheap clothes reserved minimum of cash' is the wordplay.
I cannot quite understand how this works, but
'clothes' could be 'kit' (I've seen this before) and 'kit' is present in the answer.
'cash' could be 'c' and 'c' is located in the answer.
'reserved' could be 'shy' (I've seen this in other clues) and 'shy' is found within the remaining letters.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?