Eggs are not quite oval (3)
I believe the answer is:
ova
'eggs' is the definition.
(term for egg cells)
'not quite oval' is the wordplay.
'not quite' means to remove the last letter.
'oval' with its last letter removed is 'OVA'.
'are' acts as a link.
(Other definitions for ova that I've seen before include "Female gametes" , "Female egg-cells" , "Eggs; sounds like above" , "Female egg cells" , "Fertility clinic stock!" .)