Opening for scrum-half to lean over prop (5)
I believe the answer is:
stilt
'prop' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for stilt that I've seen before include "Flier" , "gets one member off the ground" , "laboured and unnatural in the past" , "Supporting column driven into the ground - wading bird" , "Long-legged wader" .)