Slightly heated cordial (4)

I believe the answer is:

warm

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This might be a double definition.

'slightly heated' is the first definition.
'warm' can be an answer for 'heated' (I've seen this before). I'm not certain of the 'slightly' bit.

'cordial' is the second definition.
(similar in meaning)

Can you help me to learn more?

(Other definitions for warm that I've seen before include "Pleasantly hot" , "Affectionate; quite hot" , "Affectionate - balmy" , "Welcoming - getting close!" , "Lively" .)

I've seen this clue in the Evening Standard.

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