Crossword Genius

Having overindulged fast (5)

Ross

I believe the answer is:

tight

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'fast' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for tight that I've seen before include "Difficult and problematic" , "It's not enough" , "Awkward" , "Drunk, firm, concise" , "Mean; firmly fixed" .)

I've seen this clue in The Globe and Mail.
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