Many members naturally support it (9)
I believe the answer is:
centipede
'it' is the definition.
The definition suggests a singular noun which matches the answer.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for centipede that I've seen before include "Many-legged insect" , "Invertebrates with many legs" , "Creepy type" , "Invertebrate with many legs" , "Many-legged animal" .)