27 across
Fabulous
beast
in
old
jokes
at
Cambridge.
say
(7)
Fabulous beast in old jokes at Cambridge. say (7)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Fabulous beast — a unicorn being a mythical creature. UNI gives you a university (Cambridge being one example, hence "at Cambridge, say"), and CORN is your old jokes, as in corny ones. Put them together and there you have it.