Ignorant of Stubbs pottery? (7)
I believe the answer is:
unaware
'ignorant of' is the definition.
(not aware of something)
'stubbs pottery?' is the wordplay.
'stubbs' becomes 'Una' (actress Una Stubbs is an example).
'pottery?' becomes 'ware' (I've seen this in another clue).
'una'+'ware'='UNAWARE'
(Other definitions for unaware that I've seen before include "Lacking knowledge (of a situation or fact)" , "Ignorant, oblivious" , "Not congnisant (of)" , "Unexpected" , "Not having knowledge or realisation" .)