Business outlet with a means underpinning revenue (8)
I believe the answer is:
takeaway
'business outlet' is the definition.
The definition suggests a singular noun which matches the answer.
'a means underpinning revenue' is the wordplay.
'means' becomes 'way' (a way or means of doing something).
'underpinning' is a charade indicator (letters next to each other) (in a down clue, some letters go under others).
'revenue' becomes 'take' (I've seen this in another clue).
'a'+'way'='away'
'away' put after 'take' is 'TAKEAWAY'.
'with' is the link.
Can you help me to learn more?
(Other definitions for takeaway that I've seen before include "may be Chinese" , "Remove - portable meals" , "Subtract - fast food" , "Remove - portable food" , "Cafe selling food to be eaten elsewhere" .)