Arrest a chap for taking a tin-opener (4)

I believe the answer is:

halt

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'arrest' is the definition.
(I know that arrest can be written as halt)

'a chap for taking a tin-opener' is the wordplay.
'a chap' becomes 'Hal'.
'for' means one lot of letters go next to another.
'taking a tin-opener' becomes 't' (I can't justify this - if you can you should believe this answer much more).
'hal'+'t'='HALT'

Can you help me to learn more?

(Other definitions for halt that I've seen before include "Pull up" , "Cease" , "limping" , "Stop, small station" , "Limp; minor station" .)

I've seen this clue in the Evening Standard.

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