Gloss over what Marie Curie's kids were (6,6)
I believe the answer is:
french polish
'gloss' is the definition.
(I've seen this before)
'over what marie curie's kids were' is the wordplay.
I cannot quite understand how this works, but
'over' could be 're' and 're' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for french polish that I've seen before include "rub - with 15a" , "Glossy varnish for wood" , "Marie Curie was" , "buff with this" , "Shine" .)