Narrow ridge over in southwest in the past (7)

I believe the answer is:

sowback

'narrow ridge' is the definition.
(sowback is type of rocky ridge)

'over in southwest in the past' is the wordplay.
'over' becomes 'o' (cricket abbreviation).
'in' is an insertion indicator.
'southwest' becomes 'SW' (synonyms).
'in the past' becomes 'back' (synonyms).
'o' inserted into 'sw' is 'sow'.
'sow'+'back'='SOWBACK'

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app