Turn left and fly out? Absolutely! (5)
I believe the answer is:
fully
'absolutely' is the definition.
(thesaurus)
'turn left and fly out?' is the wordplay.
'turn' becomes 'u' (a 'U-turn' is a kind of turn).
'left' becomes 'L' (common abbreviation).
'and' is a charade indicator (letters next to each other).
'out?' is an insertion indicator.
'u'+'l'='ul'
'ul' going into 'fly' is 'FULLY'.
(Other definitions for fully that I've seen before include "Entirely" , "Wholly" , "In all respects" , "Completely" .)