Moody doctor met male parent (13)
I believe the answer is:
temperamental
'moody' is the definition.
(I know that moody can be written as temperamental)
'doctor met male parent' is the wordplay.
'doctor' is an anagram indicator.
'met'+'male'+'parent'='metmaleparent'
'metmaleparent' is an anagram of 'TEMPERAMENTAL'.
(Other definitions for temperamental that I've seen before include "Having a volatile disposition" , "Difficult" , "Capricious" , "Liable to mood swings" , "Erratic" .)