Wept about queen getting tin mixture (6)
I believe the answer is:
pewter
'tin mixture' is the definition.
(alloy containing tin)
'wept about queen getting' is the wordplay.
'about' indicates an anagram.
'queen' becomes 'er' (abbreviation for Elizabeth Regina).
'getting' says to put letters next to each other.
'wept' with letters rearranged gives 'pewt'.
'pewt'+'er'='PEWTER'
(Other definitions for pewter that I've seen before include "Alloy of tin with copper and antimony" , "Alloy used for utensils" , "Grey alloy of tin and lead, makes mugs etc." , "Tin alloy for utensils" , "Bluish-grey alloy" .)