Panda's diet (6)
'panda's diet' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bamboo that I've seen before include "Giant tropical grass" , "Fast-growing woody grass" , "Spotted tile; carnival mask" , "Woody grass plant" , "Thick tropical cane" .)
(Other definitions for bamboo shoots that I've seen before include "vegetables" , "Part of the Chinese dish" .)