Dynasty returns - it may have bite (4)
I believe the answer is:
gnat
'it may have bite' is the definition.
The definition suggests a singular noun which matches the answer.
'dynasty returns' is the wordplay.
'dynasty' becomes 'tang' (Chinese dynasty).
'returns' says the letters should be written backwards.
'tang' back-to-front is 'GNAT'.
Can you help me to learn more?
(Other definitions for gnat that I've seen before include "Small biting fly" , "annoying flier" , "Tang of a biting fly" , "insect's" , "mozzie" .)