Lay down rules where supporter is delayed (9)

I believe the answer is:

legislate

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'lay down rules where' is the definition.
I can't judge whether this defines the answer.

'supporter is delayed' is the wordplay.
'supporter' becomes 'leg' (eg support for a table).
'delayed' becomes 'late' (running late).
'leg'+'is'+'late'='LEGISLATE'

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(Other definitions for legislate that I've seen before include "what members do?" , "Pass law" , "For what governments do" , "Establish rules" , "what parliament must do" .)

I've seen this clue in The Guardian.

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