Crossword Genius

Hidden from public scrutiny with summer over? (5-3-7)

Ross

I believe the answer is:

under-the-counter

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'over?' is the definition.
Both the answer and definition are adjectives. Maybe they are linked in a way I don't understand?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for under-the-counter that I've seen before include "Hidden from customers' sight" , "Possible location of panic button" , "Sold illegally or secretly" , "illegal" , "Illicit" .)

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