Cheeky but drippy after taking on whiskey (6)

I believe the answer is:

impish

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

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for impish that I've seen before include "Teasingly mischievous" , "Naughty" , "Wicked" , "Mischievous like small devil" , "Playful" .)

I've seen this clue in The Irish Times.

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