No, nothing to see outside snare (5)
I believe the answer is:
noose
'snare' is the definition.
(I know that snare can be written as noose)
'no nothing to see outside' is the wordplay.
'nothing' becomes 'O' (looks like zero - 0).
'to' means one lot of letters go next to another.
'outside' means to remove the middle letters.
'see' with its centre removed is 'se'.
'no'+'o'+'se'='NOOSE'
(Other definitions for noose that I've seen before include "Loop of rope with a slipknot" , "Hangman's equipment" , "Circular loop" , "Hangman's or cowboy's loop" , "Scaffold rope" .)