Low form of night-life (3)
I believe the answer is:
owl
'night-life' is the definition.
I can't judge whether this defines the answer.
'low form' is the wordplay.
'form' indicates an anagram.
'low' with letters rearranged gives 'OWL'.
'of' is the link.
Can you help me to learn more?
(Other definitions for owl that I've seen before include "Night person" , "Winged hooter" , "Lear's loved a Pussy-cat" , "Creature" , "Bird of prey with front-facing eyes" .)