Most spot sea eagle inside low-growing plant (9)
I believe the answer is:
pimpernel
'low-growing plant' is the definition.
(I've seen this before)
'most spot sea eagle' is the wordplay.
I cannot quite understand how this works, but
'eagle' could be 'erne' (erne is a kind of eagle) and 'erne' is located in the answer.
This may be the basis of clue (or it may be nonsense).
'inside' acts as a link.
Can you help me to learn more?
(Other definitions for pimpernel that I've seen before include "Low-growing plant" , "Small scarlet flower" , "Once a much sought-after" , "Bloomer" , "The Scarlet - (Orczy)" .)