Play surprisingly large family put on (4,4)
I believe the answer is:
king lear
'play' is the definition.
(I've seen this before)
'surprisingly large family put on' is the wordplay.
'surprisingly' is an anagram indicator.
'family' becomes 'kin' ('kin' can be a synonym of 'family').
'put on' is a charade indicator (letters next to each other).
'large' with letters rearranged gives 'glear'.
'glear' put after 'kin' is 'KING LEAR'.
(Other definitions for king lear that I've seen before include "Play set in medieval Britain" , "Shakespearean tragedy" , "One of Shakespeare's tragedies" , "Tragic Shakespearean monarch" , "Shakespeare's foolish tragic monarch" .)