A French drink is not pleasant (9)

I believe the answer is:

uncordial

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'not pleasant' is the definition.
I can't tell whether this definition defines the answer.

'a french drink' is the wordplay.
'a french' becomes 'un' ('a' in French).
'drink' becomes 'cordial' (cordial is a kind of drink**).
'un'+'cordial'='UNCORDIAL'

'is' is the link.

Can you help me to learn more?

(Other definitions for uncordial that I've seen before include "fractious!" , "Cold" .)

I've seen this clue in The Telegraph.

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