Relish being shut off in Amiens, surprisingly (10)
I believe the answer is:
enthusiasm
'relish' is the definition.
(thesaurus)
'shut off in amiens surprisingly' is the wordplay.
'off' indicates anagramming the letters.
'in' is an insertion indicator.
'surprisingly' indicates anagramming the letters (a surprising ordering of the letters).
'shut' anagrammed gives 'thus'.
'amiens' is an anagram of 'eniasm'.
'thus' inserted into 'eniasm' is 'ENTHUSIASM'.
'being' acts as a link.
(Other definitions for enthusiasm that I've seen before include "Intense and lively interest" , "Avidity" , "Gusto; fervour" , "spirit?" , "Zeal" .)