Ostentatious display before close of play (5)
I believe the answer is:
showy
'ostentatious' is the definition.
('showy' can be similar in meaning to 'ostentatious')
'display before close of play' is the wordplay.
'display' becomes 'show' ('show' can be a synonym of 'display').
'before close of play' becomes 'y' (I've seen this in other clues).
'show'+'y'='SHOWY'
(Other definitions for showy that I've seen before include "Strikingly colourful" , "Ostentatious, bright" , "Colourful, ostentatious" , "Strikingly bright" , "Flamboyant" .)