Relaxed calculation on a piece of fruit (7)
I believe the answer is:
satsuma
'piece of fruit' is the definition.
'satsuma' can be an answer for 'fruit' (satsuma is a kind of fruit). I am not certain of the 'piece of' bit.
'relaxed calculation on a' is the wordplay.
'relaxed' becomes 'sat' (sitting is a type of relaxing).
'calculation' becomes 'sum' (I have seen 'Arithmetic calculation ' mean 'sum' so perhaps 'calculation' could also mean 'sum').
'on' says to put letters next to each other.
'sat'+'sum'+'a'='SATSUMA'
Can you help me to learn more?
(Other definitions for satsuma that I've seen before include "Type of small orange" , "Easily peeled orange" , "Citrus fruit; Jap. pottery" , "Kind of tangerine" , "that's segmented" .)