Isn't angry over Stanley getting seconds? (8)
I believe the answer is:
instants
'seconds?' is the definition.
('instant' can be a synonym of 'second')
'isn't angry over stanley' is the wordplay.
'angry' indicates anagramming the letters.
'over stanley' becomes 'ants' (I can't explain this - if you can you should give a lot more credence to this answer).
'isnt' anagrammed gives 'inst'.
'inst'+'ants'='INSTANTS'
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for instants that I've seen before include "Flashes" , "Very brief periods of time" , "Fleeting moments of time" .)