Seal, common colour (6,5)

I believe the answer is:

bottle green

'colour' is the definition.
(bottle green is a colour)

'seal common' is the wordplay.
'seal' becomes 'bottle' (to seal in a bottle).
'common' becomes 'green' (synonyms).
'bottle'+'green'='BOTTLE-GREEN'

(Other definitions for bottle green that I've seen before include "A shade" , "Dark virid colour" , "Colour -- to be gentler (anag)" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.