Edge past river; this one? (5)
I believe the answer is:
rhone
'one?' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'edge past river' is the wordplay.
'edge' becomes 'hone' (I've seen this in another clue).
'past' says to put letters next to each other.
'river' becomes 'r' (abbreviation for river).
'hone' put after 'r' is 'RHONE'.
'this' acts as a link.
(Other definitions for rhone that I've seen before include "Fr. river and wine" , "European river and glacier" , "River running from the Swiss Alps to the Mediterranean" , "Major French river, rising in Switzerland" , "12 wine region" .)