14 across
Sponge
back
in
shower
with
a
bar
of
soap,
having
created
one
earlier
(7,4)
Sponge back in shower with a bar of soap, having created one earlier (7,4)
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The definition is at the beginning of the clue.
How the clue works
Sponge is the definition, pointing to a kind of cake. Build it up as a charade: MADE for 'created', I for 'one', R taken from the back (last letter) of 'showe R', then A for 'a', and finally CAKE for 'bar of soap' — all assembled to give MADEIRA CAKE.