Saturate too much (5)

I believe the answer is:

steep

This clue is a double definition.

'saturate' is the first definition.
(steeping is a kind of saturating)

'too much' is the second definition.
(thesaurus)

(Other definitions for steep that I've seen before include "Precipitous - exorbitant" , "Sharply inclined" , "Saturate; precipitous" , "Marinate" , "Rapidly rising" .)

I've seen this clue in The Independent.

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