Bee or beetle (6)
I believe the answer is:
insect
'bee or beetle' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for insect that I've seen before include "Member of the largest class of creatures" , "Perhaps nit" , "Segmented invertebrate" , "Creepy-crawly" , "The entomologist studies this" .)