Trip round good 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'm not sure about the 'land' bit.
'trip round good' is the wordplay.
'trip' becomes 'ride' (I've seen this before).
'round' is an insertion indicator.
'good' becomes 'g' (abbreviation).
'ride' going around 'g' is 'RIDGE'.
Can you help me to learn more?
(Other definitions for ridge that I've seen before include "Feature of mountain" , "Top of roof or incline" , "Raised strip between two furrows" , "shelf" , "Long mountain crest or roof life" .)