But this flower is not always pink (4)
I believe the answer is:
rose
This could be a double definition.
'but this flower is not always' is the first definition.
'rose' can be an answer for 'flower' (I've seen this in other clues). I'm not sure about the rest of the definition.
'pink' is the second definition.
(colour)
Can you help me to learn more?
(Other definitions for rose that I've seen before include "Fragrant flower" , "Went up; plant" , "Prickly shrub with bright flowers" , "Flower; went upwards" , "Thorny flowering plant" .)