Policeman's patch seeing trouble (8)

I believe the answer is:

distract

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'trouble' is the definition.
(I know that distract is a more specific form of the action the trouble)

'policeman's patch' is the wordplay.
'policeman's' becomes 'di's' (detective inspector).
'patch' becomes 'tract' (I can't justify this - if you can you should give a lot more credence to this answer).
'dis'+'tract'='DISTRACT'

'seeing' is the link.

Can you help me to learn more?

(Other definitions for distract that I've seen before include "Subject to diversion" , "beguile" , "Confuse" , "Side track" , "Divert (attention) from something" .)

I've seen this clue in The Telegraph.

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