Toothless attendee moving about (8)
I believe the answer is:
edentate
'toothless' is the definition.
(edentate means lacking teeth)
'attendee moving about' is the wordplay.
'moving about' is an anagram indicator.
'attendee' anagrammed gives 'EDENTATE'.
(Other definitions for edentate that I've seen before include "Lacking teeth" , "Gummy" , "sloth, say" , "Mammal with few or no teeth" , "Sloth, perhaps" .)