Amazon, for one (1,6)
'amazon for one' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for e tailer that I've seen before include "... businessman here [THE NET]" , "Modern trader" , "internet business" , "online seller" , "internet seller" .)
'amazon for one' is the definition.
(amazon is a kind of river)
This is all the clue.
(Other definitions for river that I've seen before include "x or y, so to speak" , "Current" , "Eg, Severn" , "flower" , "eg Aire" .)