Loaf rose, say? (7)
I believe the answer is:
bloomer
This clue could be a double definition.
'loaf' is the first definition.
(I've seen this before)
'rose say?' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for bloomer that I've seen before include "A loaf; an error" , "Something from the baker" , "Big mistake" , "rose, say" , "Large slip" .)