Toughened blade retracts for transporting (6-7)

I believe the answer is:

battle-scarred

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'toughened' is the definition.
Both the definition and answer are adjectives. Maybe there's a link between them I don't understand?

'blade retracts for transporting' is the wordplay.
'for transporting' is an anagram indicator (the letters are transported around).
'blade'+'retracts'='bladeretracts'
'bladeretracts' with letters rearranged gives 'BATTLE-SCARRED'.

Can you help me to learn more?

(Other definitions for battle-scarred that I've seen before include "Damaged in warfare" , "Visibly wounded" , "War-torn" .)

I've seen this clue in The Telegraph.

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