Scaling rocks when visiting favourite Hebridean location (7,4)
I believe the answer is:
fingals cave
'hebridean location' is the definition.
(I know that Fingals Cave is in Hebrides)
'scaling rocks when visiting favourite' is the wordplay.
'rocks' indicates an anagram.
'when visiting' is an insertion indicator.
'favourite' becomes 'fave' (abbreviation).
'scaling' anagrammed gives 'ingalsc'.
'ingalsc' placed within 'fave' is 'FINGALS CAVE'.
(Other definitions for fingals cave that I've seen before include "overture" , "Rock music" .)