Fancy having silver in change (6)
I believe the answer is:
vagary
'fancy' is the definition.
(thesaurus)
'silver in change' is the wordplay.
'silver' becomes 'ag' (Ag is the chemical symbol for silver).
'in' is an insertion indicator.
'change' becomes 'vary' ('vary' can be a synonym of 'change'**).
'ag' inserted within 'vary' is 'VAGARY'.
'having' acts as a link.
(Other definitions for vagary that I've seen before include "Unexpected and inexplicable change" , "Clip out, cut off" , "Erratic action" , "Capricious idea for a gravy" , "Capricious act or idea" .)