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Weirdo
following
one
in
poor
visibility
(6)
Weirdo following one in poor visibility (6)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
Weirdo is the definition here. Take MIST (a cause of poor visibility) and slot inside it F (short for "following") plus I (the Roman numeral for one), so FI drops into MIST to give MISFIT.