Coin and note put into one aperture (6)
I believe the answer is:
invent
'coin' is the definition.
(I know that coin is a more specific form of the action invent)
'note put into one aperture' is the wordplay.
'note' becomes 'n' (abbreviation).
'put into' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'aperture' becomes 'vent' (I've seen this in another clue).
'i'+'vent'='ivent'
'n' placed into 'ivent' is 'INVENT'.
'and' is the link.
(Other definitions for invent that I've seen before include "Create like Edison" , "Make or design something original" , "Discover Devise, concoct" , "Design for the first time" , "Devise (something new)" .)