Some really grand climbs in part of Scotland (6)
I believe the answer is:
argyll
'part of scotland' is the definition.
(I've seen this before)
'some really grand climbs' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'climbs' says the letters should be written in reverse.
'llygra' is hidden within 'really grand'.
'llygra' in reverse letter order is 'ARGYLL'.
'in' is the link.
(Other definitions for argyll that I've seen before include "Region of west Scotland" , "Campbell country" , "Part of Scotland" , "Historic Scots county" , "------ and Bute, Scottish administrative district" .)