Eggs are done, we hear (3)
I believe the answer is:
ova
'eggs' is the definition.
(I've seen this before)
'done we hear' is the wordplay.
'done' becomes 'over' (I've seen this before).
'we hear' indicates a 'sounds like' (homophone) clue.
'over' sounds like 'OVA'.
'are' is the link.
(Other definitions for ova that I've seen before include "Latin egg-cells" , "Fertility clinic stock!" , "Potential life sources" , "Eggs; sounds like above" , "Female egg-cells" .)