Crossword Genius

A mischievous creature sent back, one bringing irritation? (4)

Ross

I believe the answer is:

flea

I'm a little stuck... Click here to teach me more about this clue!

'irritation?' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.

'a mischievous creature sent back one' is the wordplay.
'a mischievous creature' becomes 'elf' (creature in folk lore).
'sent back' is a reversal indicator.
'one' becomes 'a' (a thing is one thing).
'elf' backwards is 'fle'.
'fle'+'a'='FLEA'

'bringing' is the link.

Can you help me to learn more?

(Other definitions for flea that I've seen before include "In one's ear, it's a stinging rebuke" , "In your ear, this insect is a rebuke" , "Wingless, jumping insect" , "Small blood-sucking insect" , "Small parasitic insect" .)

I've seen this clue in The Independent.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.