Weapon found in Aberdeen oddly abandoned, good French one (4,3)
I believe the answer is:
bren gun
'weapon' is the definition.
(Bren gun is an example)
'aberdeen oddly abandoned good french one' is the wordplay.
'oddly abandoned' indicates alternate letters (letters in odd-numbered positions removed).
'good' becomes 'g' (abbreviation).
'french one' becomes 'un' (northern English dialect form of 'one'. I am not sure about the 'french' bit.).
The alternate letters of 'aberdeen' are 'bren'.
'bren'+'g'+'un'='BREN GUN'
'found in' is the link.
Can you help me to learn more?
(Other definitions for bren gun that I've seen before include "Former army weapon" , "Military weapon" , "Weapon used in World War II" .)