Average spend for the moment (9)
I believe the answer is:
meanwhile
'for the moment' is the definition.
(I've seen this before)
'average spend' is the wordplay.
'average' becomes 'mean' (type of average).
'spend' becomes 'while' (I can't explain this - if you can you should believe this answer much more).
'mean'+'while'='MEANWHILE'
Can you help me to learn more?
(Other definitions for meanwhile that I've seen before include "In the interim" , "simultaneously" , "On the other hand" , "In the intervening time" , "For the moment" .)