Lent ad out about canines? (6)
I believe the answer is:
dental
'about canines?' is the definition.
(relating to teeth - canines are a type of teeth)
'lent ad out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'lent'+'ad'='lentad'
'lentad' with letters rearranged gives 'DENTAL'.
(Other definitions for dental that I've seen before include "Relating to teeth" , "Pertaining to teeth" , "Concerning teeth" , "Concerned with teeth" , "sort of surgeon" .)