Tuscan seen preparing food and drink (10)
I believe the answer is:
sustenance
'food and drink' is the definition.
(thesaurus)
'tuscan seen preparing' is the wordplay.
'preparing' indicates an anagram (I've seen 'prepared' mean this).
'tuscan'+'seen'='tuscanseen'
'tuscanseen' anagrammed gives 'SUSTENANCE'.
(Other definitions for sustenance that I've seen before include "Nourishment" , "Nutriment" , "Food and drink" , "cooking provides this?" .)