Primrose worth two in pot (6)
I believe the answer is:
yellow
'primrose' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for yellow that I've seen before include "Lily-livered" , "Flaxen" , "Rainbow colour between orange and green" , "Offensively sensational" , "Telephone reference book" .)