Green spots in food store leading to no serious comment (10)
I believe the answer is:
pleasantry
'no serious comment' is the definition.
(pleasantries are meaningless comments)
'green spots in food store' is the wordplay.
'green spots' becomes 'leas' (a lea is a meadow).
'in' indicates putting letters inside.
'food store' becomes 'pantry' (cupboard for storing food).
'leas' going into 'pantry' is 'PLEASANTRY'.
'leading to' is the link.
(Other definitions for pleasantry that I've seen before include "Slightly amusing remark" , "Sally" , "An agreeable remark" , "jocularity" , "Source of laughter" .)