Directed opening of Cor Blimey! — new English play (9)
I believe the answer is:
cymbeline
'play' is the definition.
(I've seen this before)
'directed opening of cor blimey new english' is the wordplay.
'directed' indicates anagramming the letters.
'opening of' says to take the initial letters.
'new' becomes 'n' (abbreviation as in New Testament NT).
'english' becomes 'E' (abbreviation as in OED).
The first letter of 'cor' is 'c'.
'c'+'blimey'='cblimey'
'cblimey' is an anagram of 'cymbeli'.
'cymbeli'+'n'+'e'='CYMBELINE'
(Other definitions for cymbeline that I've seen before include "British king during Roman invasion" , "Shakespeare play" , "Play set in ancient Britain" , "drama" , "British king in play" .)