Small boat from County Clare at sea (7)
I believe the answer is:
coracle
'small boat' is the definition.
(coracle is a kind of small boat)
'county clare at sea' is the wordplay.
'county' becomes 'co'.
'at sea' indicates an anagram.
'clare' anagrammed gives 'racle'.
'co'+'racle'='CORACLE'
'from' is the link.
(Other definitions for coracle that I've seen before include "Small wickerwork boat" , "Small round boat of skin over a wicker frame" , "Traditional rounded boat with wicker frame" , "Welsh version of the currach" , "Small round boat of hides stretched over a wicker frame" .)