It's grand to ride around the high ground (5)
I believe the answer is:
ridge
'high ground' is the definition.
(I've seen this in another clue)
'it's grand to ride around' is the wordplay.
'it's grand' becomes 'g' (G is short for grand as in a thousand).
'to' means one lot of letters go next to another (I've seen this in other clues).
'around' is an anagram indicator.
'g' put after 'ride' is 'rideg'.
'rideg' with letters rearranged gives 'RIDGE'.
'the' acts as a link.
(Other definitions for ridge that I've seen before include "Raised earth between furrows" , "Part of mountain" , "Line of raised ground" , "Raised line of ice" , "Narrow raised strip as between hills" .)