County with a fringe on top? (6)
I believe the answer is:
surrey
'county' is the definition.
(English county)
'fringe on top?' is the wordplay.
I cannot really see how this works, but
'on' could be 're' ('on' can be mean 'with reference to') and 're' is found within the answer.
This explanation may well be incorrect...
'with a' acts as a link.
(Other definitions for surrey that I've seen before include "County SW of London" , "County, light carriage" , "Home county" , "coach?" , "headed off by Henry" .)