An age to put up place for a concert (5)
I believe the answer is:
arena
'place for a concert' is the definition.
(I've seen this in another clue)
'an age to put up' is the wordplay.
'age' becomes 'era' (both can mean a long time).
'to put up' says the letters should be written in reverse.
'an'+'era'='anera'
'anera' back-to-front is 'ARENA'.
(Other definitions for arena that I've seen before include "Ring; stage" , "Playing area" , "Coliseum" , "Cheap Prom tickets" , "Place of public contest" .)