Unfortunate lad married flighty type (3,7)
I believe the answer is:
red admiral
'flighty type' is the definition.
(type of butterfly, something which flies)
'unfortunate lad married' is the wordplay.
'unfortunate' indicates anagramming the letters.
'lad'+'married'='ladmarried'
'ladmarried' is an anagram of 'RED ADMIRAL'.
(Other definitions for red admiral that I've seen before include "Vanessa" , "Species of butterfly" , "Russian sailor" , "See butterfly" , "Common butterfly" .)