See live bear (6)
I believe the answer is:
behold
'see' is the definition.
(beholding is a kind of seeing)
'live bear' is the wordplay.
'live' becomes 'be' ('be' can be a synonym of 'live').
'bear' becomes 'hold' ('hold' can be a synonym of 'bear'**).
'be'+'hold'='BEHOLD'
(Other definitions for behold that I've seen before include "Archaic injunction to look" , "See, with attention" , "Look upon" , "See! Look!" , "Archaic injunction to observe" .)