It broadens the mind of a reformed varlet (6)

I believe the answer is:

travel

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'it broadens the mind' is the definition.
The definition suggests a singular noun which matches the answer.

'a reformed varlet' is the wordplay.
'a reformed' indicates anagramming the letters.
'varlet' with letters rearranged gives 'TRAVEL'.

'of' is the link.

Can you help me to learn more?

(Other definitions for travel that I've seen before include "Tourism" , "Voyage" , "Varlet (anag.)" , "Locomotion" , "Movement from one place to another" .)

I've seen this clue in the Evening Standard.

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