Spring plant (5)
I believe this clue is a double definition.
'spring' is the first definition.
(I know that hop is a more specific form of the action spring)
'plant' is the second definition.
The answer is an example.
(Other definitions for hop that I've seen before include "Climbing plant used to flavour beer (3)" , "Cone which flavours beer" , "Beer flavouring; jump" , "..., skip and jump" , "Move on one leg" .)
(Other definitions for tulip that I've seen before include "Bulb producing a single showy flower" , "Garden flower from bulb" , "Pretty flower, musically from Amsterdam" , "Liliaceous plant with a spring flower" , "Dutch export" .)