Track to follow round peaks where fruit grows (8)
I believe the answer is:
orangery
'where fruit grows' is the definition.
(where orange trees grow)
'track to follow round peaks' is the wordplay.
'track' becomes 'RY' (abbreviation for railway).
'to follow' says to put letters next to each other.
'round' becomes 'o' (round can mean a round object).
'peaks' becomes 'range' (mountain range).
'o'+'range'='orange'
'ry' put after 'orange' is 'ORANGERY'.
(Other definitions for orangery that I've seen before include "Building in which citrus fruits are grown" , "glasshouse" , "Greenhouse for fruit bushes" , "Type of conservatory" , "greenhouse, maybe" .)