Are they drunk for morale? (7)

I believe the answer is:

spirits

I'm a little stuck... Click here to teach me more about this clue!

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

I don't understand the rest of the clue.

(Other definitions for spirits that I've seen before include "rum, say" , "Gin, vodka, rum etc" , "Animating forces or hard liquors" , "shorts" , "Shades" .)

I've seen this clue in the Evening Standard.

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