Opening of honeypot? I'm not sure — tip from Pooh Bear (4)
I believe the answer is:
hump
'bear' is the definition.
(thesaurus)
'opening of honeypot? i'm not sure tip from pooh' is the wordplay.
'opening of' indicates taking the first letters.
'i'm not sure' becomes 'um' (expression of hesitation).
'tip from' indicates taking the first letters.
The first letter of 'honeypot' is 'h'.
The first letter of 'pooh' is 'p'.
'h'+'um'+'p'='HUMP'
(Other definitions for hump that I've seen before include "Carry (heavy loads) (informal)" , "Part of a camel" , "Feature of llama, camel" , "Decorative edging" , "Hunch - sulks" .)