Introverted and haggard (9)
I believe the answer is:
withdrawn
'introverted' is the definition.
(I've seen this before)
'and haggard' is the wordplay.
'and' becomes 'with'.
'haggard' becomes 'drawn' (synonyms).
'with'+'drawn'='WITHDRAWN'
(Other definitions for withdrawn that I've seen before include "Shy, reserved" , "Rather shy" , "Introverted" , "scratched" , "Private" .)