Open container carried out (6)
I believe the answer is:
candid
'open' is the definition.
(I've seen this before)
'container carried out' is the wordplay.
'container' becomes 'can' (can is a kind of container).
'carried out' becomes 'did' (to do something is to carry out or execute it).
'can'+'did'='CANDID'
(Other definitions for candid that I've seen before include "Free and frank" , "Frank, forthright" , "Frank - and CID (anag)" , "Impartial" , "Frank and outspoken" .)