Ironmonger's speeds across a road initially worrying, having obstructed police from the start (8,4)
I believe the answer is:
hardware shop
'initially worrying having obstructed police from the start' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'ironmonger's speeds across a road' is the wordplay.
I cannot really understand how this works, but
'a' is found in the answer.
'road' could be 'rd' (abbreviation for road) and 'rd' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
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