Large kind of bag containing real dancing bear (8)
I believe the answer is:
tolerate
'bear' is the definition.
(synonyms)
'large kind of bag containing real dancing' is the wordplay.
'large kind of bag' becomes 'tote' (tote is a kind of bag).
'containing' means one lot of letters goes inside another.
'dancing' is an anagram indicator.
'real' is an anagram of 'lera'.
'tote' placed around 'lera' is 'TOLERATE'.
(Other definitions for tolerate that I've seen before include "Endure with forbearance" , "Be indulgent" , "Withstand" , "Family relative" , "Treat fairly" .)