11 down
Offer
and
appraisal
both
turned
out
to
be
unwritten
(4)
Offer and appraisal both turned out to be unwritten (4)
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The definition is at the end of the clue.
How the clue works
The definition is unwritten, meaning spoken rather than written down. The outer letters ("turned out") of both words give O+R from "offer" and A+L from "appraisal", combining to ORAL.