Pochard is flying high (9)
I believe the answer is:
rhapsodic
'high' is the definition.
(thesaurus)
'pochard is flying' is the wordplay.
'flying' indicates an anagram.
'pochard'+'is'='pochardis'
'pochardis' with letters rearranged gives 'RHAPSODIC'.
(Other definitions for rhapsodic that I've seen before include "Expressing delight" , "Ecstatic, extravagantly enthusiastic" , "Wildly emotional" , "Expressing ecstatic feeling" , "of utter delight" .)