Small bear dancing with sword (5)
I believe the answer is:
sabre
'sword' is the definition.
(I know that sabre is a type of sword)
'small bear dancing' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'dancing' indicates an anagram.
'bear' is an anagram of 'abre'.
's'+'abre'='SABRE'
'with' is the link.
(Other definitions for sabre that I've seen before include "Sword with curved blade" , "Walt --, cartoonist" , "Large wasp" , "Bares (anag.)" , "Slasher" .)