Very large number (7)
'very large number' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for zillion that I've seen before include "Unspecified enormous number" , "Great quantity" , "Huge unspecified number" , "Huge, unspecified figure" , "Indefinite multiple of 22 Across" .)
'very large number' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for trillion that I've seen before include "Very large number" , "A great number" , "One million million" , "US billion" , "enormous figure" .)
'very large number' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for googol that I've seen before include "Ten to the power of 100" , "10100" , "There's a huge amount!" , "very large number" , "Big number" .)