Colt's head sports scar, bone repeatedly bashed climbing these? (6,7)

I believe the answer is:

brecon beacons

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'climbing these?' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'colt's head sports scar bone repeatedly bashed' is the wordplay.
'bone repeatedly' means two substitutions for 'bone'.
'head' says to take the initial letters.
'sports' means one lot of letters goes inside another (inserted letters wear or 'sport' others).
'bashed' indicates anagramming the letters.
The initial letter of 'colts' is 'c'.
'scar'+'bone'+'bone'='scarbonebone'
'scarbonebone' with letters rearranged gives 'breonbeacons'.
'c' placed inside 'breonbeacons' is 'BRECON BEACONS'.

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(Other definitions for brecon beacons that I've seen before include "Welsh mountains" , "National park in Wales" , "Mountainous Welsh region" .)

I've seen this clue in The Telegraph.

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