Parody beginning of show, and finish (4,2)
I believe the answer is:
send up
'parody' is the definition.
(I've seen this before)
'beginning of show and finish' is the wordplay.
'beginning of' says to take the initial letters.
'and' is a charade indicator (letters next to each other).
'finish' becomes 'endup' ('end up' can be a synonym of 'finish').
The initial letter of 'show' is 's'.
's'+'endup'='SEND-UP'
(Other definitions for send up that I've seen before include "Supply from below; lampoon" , "satirical play" , "Ridicule with satire" , "Make fun of, parody" , "Make fun of or dispatch aloft" .)