Bear eating nothing bland (6)
I believe the answer is:
boring
'bland' is the definition.
(thesaurus)
'bear eating nothing' is the wordplay.
'bear' becomes 'bring' (both can mean to carry).
'eating' means one lot of letters goes inside another.
'nothing' becomes 'o' (O resembles 0).
'bring' placed around 'o' is 'BORING'.
(Other definitions for boring that I've seen before include "Drilling - it's monotonous" , "Making holes" , "Mentally wearying" , "flat" , "Dull and repetitive, a turn-off" .)