Crossword Genius

Abbreviated exchange about power walk (5)

Ross

I believe the answer is:

tramp

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'walk' is the definition.
(tramp can mean to walk around)

'abbreviated exchange about power' is the wordplay.
'abbreviated exchange about' becomes 'tr' (I can't explain this - if you can you should give a lot more credence to this answer).
'power' becomes 'amp'.
'tr'+'amp'='TRAMP'

Can you help me to learn more?

(Other definitions for tramp that I've seen before include "Walk noisily; vagrant" , "Down-and-out" , "Walk heavily and firmly" , "Beggar or vagrant" , "Lady or gentleman of the road or roving ship" .)

I've seen this clue in The Guardian.
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