Essential when climbing to get fruit (7)
I believe the answer is:
satsuma
'fruit' is the definition.
(I know this)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for satsuma that I've seen before include "Loose-skinned tangerine" , "Citrus fruit from Japan" , "Orange - type of pottery" , "sort of orange" , "Orange, district and style of Japanese pottery" .)