Trip round grand land feature (5)
I believe the answer is:
ridge
'land feature' is the definition.
'ridge' can be an answer for 'feature' (I have seen 'Feature of mountain' mean 'ridge' so perhaps 'feature' could also mean 'ridge'). I am unsure of the 'land' bit.
'trip round grand' is the wordplay.
'trip' becomes 'ride' (eg a trip in a car).
'round' indicates putting letters inside.
'grand' becomes 'g' (G is short for grand as in a thousand).
'ride' enclosing 'g' is 'RIDGE'.
Can you help me to learn more?
(Other definitions for ridge that I've seen before include "Top of roof or incline" , "Wrinkle" , "there's a lot of pressure in it" , "Narrow raised strip as between hills" , "Line of raised ground" .)