Go round base of col in rocky ridge (6)

I believe the answer is:

girdle

'go round' is the definition.
(thesaurus)

'base of col in rocky ridge' is the wordplay.
'base of' suggests the final letters.
'in' indicates putting letters inside.
'rocky' indicates an anagram.
The last letter of 'col' is 'l'.
'ridge' with letters rearranged gives 'girde'.
'l' inserted inside 'girde' is 'GIRDLE'.

(Other definitions for girdle that I've seen before include "Close-fitting foundation garment" , "Waistbelt" , "Belt, corset" , "Waist cord; corset" , "CLOTHING" .)

I've seen this clue in The Guardian.

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