Digress in law and err (6)

I believe the answer is:

wander

'digress' is the definition.
('wander' can be a synonym of 'digress')

'in law and err' is the wordplay.
'in' says the answer is hidden in the clue.
'WANDER' is hidden in the letters of 'law and err'.

(Other definitions for wander that I've seen before include "Stroll" , "Meander" , "Warden (anag.)" , "Roam around aimlessly" , "go wrong" .)

I've seen this clue in The Times.

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