Stumped, falls over, limiting time to resume (5,5)

I believe the answer is:

start again

'resume' is the definition.

'stumped falls over limiting time' is the wordplay.
'stumped' becomes 'st' (I've seen this in other clues).
'falls' becomes 'niagara' (I've seen this before**).
'over' is a reversal indicator.
'limiting' indicates putting letters inside.
'time' becomes 't'.
'niagara' back-to-front is 'aragain'.
'aragain' placed around 't' is 'artagain'.
'st'+'artagain'='START AGAIN'

'to' acts as a link.

I've seen this clue in The Guardian.

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