Plant such as cowslip or polyanthus (7)
I believe the answer is:
primula
I believe this is a double definition.
'plant such as cowslip' is the first definition.
(I've seen this before)
'polyanthus' is the second definition.
(I've seen this before)
(Other definitions for primula that I've seen before include "Polyanthus" , "Cowslip relative" , "Plant such as cowslip" , "Primrose" , "Cowslip genus" .)