Proposing one time over jewellery (7)
I believe the answer is:
tabling
'proposing' is the definition.
(to table a motion is to propose it)
'one time over jewellery' is the wordplay.
'one time' becomes 'ta' (I can't explain this - if you can you should believe this answer much more).
'over' means one lot of letters go next to another (in a down clue, some letters go over others).
'jewellery' becomes 'bling' (informal term for jewellery).
'ta'+'bling'='TABLING'
Can you help me to learn more?
(Other definitions for tabling that I've seen before include "Submitting for consideration" , "Putting forward (motion) for consideration" .)