Bloomer in this setter short of a failing? (5)
I believe the answer is:
lupin
'bloomer' is the definition.
(I've seen this before)
'in this setter short of a failing?' is the wordplay.
I cannot quite see how this works, but
'in' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for lupin that I've seen before include "Nobody's child" , "Tall garden flower" , "Tall-spiked flower" , "Flower with spike of usually purplish-blue flowers" , "Tall-spiked plant" .)