Warm liqueur (7)
I believe the answer is:
cordial
I believe this clue is a double definition.
'warm' is the first definition.
(similar in meaning)
'liqueur' is the second definition.
(I know that liqueur can be written as cordial)
(Other definitions for cordial that I've seen before include "Affable type of sweet drink?" , "Hearty - drink" , "Pleasant - soft drink" , "7 [HEARTY]" , "Warmly welcoming to the drink" .)