A time to look up where the show is? (5)
I believe the answer is:
arena
'where the show is?' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'a time to look up' is the wordplay.
'a' becomes 'an'.
'time' becomes 'era' (I've seen this before**).
'to look up' is a reversal indicator (I've seen 'looking up' mean this).
'an'+'era'='anera'
'anera' written backwards gives 'ARENA'.
Can you help me to learn more?
(Other definitions for arena that I've seen before include "Venue for contests" , "dramatic situation" , "place for sporting contest" , "battlefieId" , "sports ground" .)