Perhaps my pet needs feeding (5)
I believe the answer is:
empty
'feeding' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'perhaps my pet' is the wordplay.
'perhaps' indicates anagramming the letters.
'my'+'pet'='mypet'
'mypet' anagrammed gives 'EMPTY'.
'needs' acts as a link.
Can you help me to learn more?
(Other definitions for empty that I've seen before include "(Of words) insincere" , "Void; vacant" , "Vacuous" , "vain" , "worthless" .)