Minor extraction of venom in a leg (7)

I believe the answer is:

nominal

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

'minor' is the definition.
(I've seen this before)

'of venom in a leg' is the wordplay.
'of' indicates the answer is hidden within the clue.
'NOMINAL' is hidden within 'venom in a leg'.

'extraction' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for nominal that I've seen before include "Trivial" , "virtually nothing" , "So called" , "In name or form only" , "trifling" .)

I've seen this clue in The Telegraph.

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.