Yes, mama is upset with a child stupidly making bloomer (10,5)
I believe the answer is:
michaelmas daisy
'bloomer' is the definition.
(Michaelmas daisy is an example)
'yes mama is upset with a child' is the wordplay.
'upset with' is an anagram indicator.
'yes'+'mama'+'is'='yesmamais'
'a'+'child'='achild'
'yesmamais' with its letters mixed up with 'achild' makes 'MICHAELMAS DAISY'.
'stupidly making' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.
(Other definitions for michaelmas daisy that I've seen before include "Variety of aster" , "Autumnal flower" , "Bloomer" , "plant" .)