Artist in time for lecture? (6)
I believe the answer is:
tirade
'lecture?' is the definition.
(thesaurus)
'artist in time' is the wordplay.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'in' indicates putting letters inside.
'time' becomes 'tide'.
'ra' going inside 'tide' is 'TIRADE'.
'for' acts as a link.
(Other definitions for tirade that I've seen before include "Long speech of angry criticism" , "String of invective" , "Prolonged abusive speech" , "A long abusive denunciation" , "Sustained abuse" .)