Ford river in wet buggy in Jersey or Guernsey, say? (8)
I believe the answer is:
knitwear
'jersey or guernsey say?' is the definition.
(both are kinds of knitwear)
'ford river in wet buggy in' is the wordplay.
'ford' becomes 'ka' (the Ka is a type of Ford car**).
'river' becomes 'r'.
'buggy' indicates an anagram.
'in' means one lot of letters goes inside another.
'in'+'wet'='inwet'
'inwet' with letters rearranged gives 'nitwe'.
'ka'+'r'='kar'
'kar' enclosing 'nitwe' is 'KNITWEAR'.
(Other definitions for knitwear that I've seen before include "Woollens" , "Jumper" , "Woollen goods" , "sweaters, for example" , "Woollies" .)