Does it moan when the gardener pulls it up? (8)
I believe the answer is:
'it up?' is the definition.
The definition suggests a singular noun which matches the answer.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for bindweed that I've seen before include "Strangler" , "Twining invasive plant" , "Gardener's bane - widen bed (anag)" , "Be winded (anag.)" , "Convolvulus" .)