Cracking lad married flighty type (3,7)
I believe the answer is:
red admiral
'flighty type' is the definition.
(type of butterfly, something which flies)
'cracking lad married' is the wordplay.
'cracking' indicates an anagram.
'lad'+'married'='ladmarried'
'ladmarried' with letters rearranged gives 'RED ADMIRAL'.
(Other definitions for red admiral that I've seen before include "Beautiful creature" , "Winger" , "Common butterfly" , "Tiny flier" , "Russian sailor" .)