Throw lunettes out (8)
I believe the answer is:
unsettle
'throw' is the definition.
(throw can mean to unsettle or disturb)
'lunettes out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'lunettes' anagrammed gives 'UNSETTLE'.
(Other definitions for unsettle that I've seen before include "Make uneasy, disturb the calm of" , "Upset" , "Throw" , "Disturb, disconcert" , "worry" .)