Snare wild ones crossing over (5)
I believe the answer is:
noose
'snare' is the definition.
(synonyms)
'wild ones crossing over' is the wordplay.
'wild' is an anagram indicator.
'crossing' is an insertion indicator.
'over' becomes 'o' (cricket abbreviation).
'ones' anagrammed gives 'nose'.
'nose' going around 'o' is 'NOOSE'.
(Other definitions for noose that I've seen before include "Circular loop" , "Sliding loop in a lasso (5)" , "Loop in a rope made with a slip knot" , "Hangman's equipment" , "Loop at the end of a rope" .)