Oddly flashy back of toilet cleaner (6)
I believe the answer is:
loofah
This clue could be a double definition.
'oddly flashy back of toilet' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'cleaner' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for loofah that I've seen before include "tropical plant" , "Halo of the washing sponge?" , "Bathroom sponge made of halo" , "Rough sort of sponge" , "Back scrubber" .)