Animal hospital longing to get answer (5)
I believe the answer is:
hyena
'animal' is the definition.
(thesaurus)
'hospital longing to get answer' is the wordplay.
'hospital' becomes 'h'.
'longing' becomes 'yen' (yen is a kind of longing).
'to get' says to put letters next to each other.
'answer' becomes 'a' (abbreviation eg in Q and A).
'h'+'yen'+'a'='HYENA'
(Other definitions for hyena that I've seen before include "Wild animal" , "he's a laugh" , "one to laugh" , "He's sometimes spotted" , "Its howl sounds like laughter" .)