Such delays put stopwatch on the prisoners (4-4)

I believe the answer is:

time-lags

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'such delays' is the definition.
'time-lags' can be an answer for 'delays' (I've seen this in another clue). I'm not certain of the 'such' bit.

'stopwatch on the prisoners' is the wordplay.
'stopwatch on' becomes 'time' (I can't justify this - if you can you should give a lot more credence to this answer).
'the prisoners' becomes 'lags'.
'time'+'lags'='TIME-LAGS'

'put' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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