Husband longing to introduce a source of wild laughter? (5)
I believe the answer is:
hyena
'source of wild laughter?' is the definition.
(I've seen this in another clue)
'husband longing to introduce a' is the wordplay.
'husband' becomes 'h' (abbreviation).
'longing' becomes 'yen' (yen can mean a desire or longing for something).
'to introduce' says to put letters next to each other (some letters come before or introduce others).
'h'+'yen'+'a'='HYENA'
(Other definitions for hyena that I've seen before include "Dog-like scavenger" , "Carnivore with sloping body" , "one may be spotted" , "Carnivorous animal with howl like laughter" , "Nocturnal animal with hysterical laugh" .)