Bloomer made by teacher going round a new food shop (9)
I believe the answer is:
dandelion
'bloomer' is the definition.
'teacher going round a new food shop' is the wordplay.
'teacher' becomes 'don' (don is a kind of teacher).
'going round' is an insertion indicator.
'a new' becomes 'an' (I've seen this in other clues).
'food shop' becomes 'deli' ('deli' can be a synonym of 'food shop').
'an'+'deli'='andeli'
'don' enclosing 'andeli' is 'DANDELION'.
'made by' is the link.
(Other definitions for dandelion that I've seen before include "Common yellow-flowered plant" , "salad leaves" , "Wild flower with serrated leaves" , "One blooming" , "It has a bright yellow flower followed by a fluffy seed ball" .)