Ignorant landlord interrupts nude dancing (10)
I believe the answer is:
unlettered
'ignorant' is the definition.
('unlettered' can be a synonym of 'ignorant')
'landlord interrupts nude dancing' is the wordplay.
'landlord' becomes 'letter' (landlords let property).
'interrupts' indicates putting letters inside.
'dancing' is an anagram indicator.
'nude' is an anagram of 'uned'.
'letter' placed into 'uned' is 'UNLETTERED'.
(Other definitions for unlettered that I've seen before include "with little education" , "Poorly educated" , "characterless?" , "Not well educated" , "your grid is empty" .)