Hurt leg, say cycling within group creating problem (9,5)
I believe the answer is:
stumbling block
'hurt leg' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'cycling within group creating problem' is the wordplay.
I cannot really understand how this works, but
'within' could be 'in' and 'in' is present in the answer.
'group' could be 'block' (a group or cluster of things) and 'block' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'say' is the link.
Can you help me to learn more?
(Another definition for stumbling block that I've seen is " obstacle".)