More sensible form of snare (5)
I believe the answer is:
saner
'more sensible' is the definition.
'form of snare' is the wordplay.
'form of' is an anagram indicator (the letters need to be in another 'form').
'snare' with letters rearranged gives 'SANER'.
(Other definitions for saner that I've seen before include "Less mad" , "less as hatter?" .)
I've seen this clue in the Evening Standard.
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