5 down
Amateurish
PC
met
with
destruction
–
it
has
no
application,
practically
(4,11)
Amateurish PC met with destruction – it has no application, practically (4,11)
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The whole clue is the definition (& lit or double definition).
How the clue works
The definition is Amateurish PC met with destruction – it has no application, practically — the whole clue doubles as a cheeky description of PURE MATHEMATICS, the branch of maths famously divorced from real-world use. Destruction is your anagram indicator, and the letters of amateurish PC met scramble up beautifully to give you the answer.