Theatre permitted audience finally full (7)
I believe the answer is:
replete
'full' is the definition.
(I know that full can be written as replete)
'theatre permitted audience finally' is the wordplay.
'theatre' becomes 'rep' (repertory theatre).
'permitted' becomes 'let' (to let something happen is to permit it).
'finally' indicates one should take the final letters.
The final letter of 'audience' is 'e'.
'rep'+'let'+'e'='REPLETE'
(Other definitions for replete that I've seen before include "Full to capacity" , "Full, sated" , "Gorged, satiated" , "Well-fed" , "Filled, sated" .)