River meandering round the outskirts of Arras? (4)
I believe the answer is:
saar
'river meandering' is the definition.
I can't tell whether this definition defines the answer.
'round the outskirts of arras?' is the wordplay.
'round' indicates anagramming the letters.
'the outskirts of' says to hollow out the word (remove centre letters).
'arras' with its centre taken out is 'aras'.
'aras' is an anagram of 'SAAR'.
Can you help me to learn more?
(Other definitions for saar that I've seen before include "German wine valley" , "River of France and Germany" .)