New tier assigned as prime viewing space (8,4)
I believe the answer is:
ringside seat
'prime viewing space' is the definition.
'ringside seat' can be an answer for 'space' (ringside seat is a kind of space). I'm unsure of the 'prime viewing' bit.
'new tier assigned' is the wordplay.
'new' indicates anagramming the letters.
'tier'+'assigned'='tierassigned'
'tierassigned' anagrammed gives 'RINGSIDE SEAT'.
'as' is the link.
Can you help me to learn more?
(Other definitions for ringside seat that I've seen before include "Best place to see boxing match?" , "Good place from which to observe" , "Place with a good view" , "Position close to the action" , "place with great view" .)