Satisfied completely by one cold tinny (8)
I believe the answer is:
metallic
'tinny' is the definition.
(thesaurus)
'satisfied completely by one cold' is the wordplay.
'satisfied' becomes 'met' ('meet' can be a synonym of 'satisfy').
'completely' becomes 'all' ('all' can be a synonym of 'completely'**).
'by' says to put letters next to each other.
'one' becomes 'i' (Roman numeral).
'cold' becomes 'c' (eg on taps).
'met'+'all'+'i'+'c'='METALLIC'
(Other definitions for metallic that I've seen before include "Characteristic of a shiny solid element" , "sound of a bell?" , "Of the nature of tin, iron, copper etc" , "Call time (anag.)" , "This car paint say, gives a shiny surface" .)