13 Across, Played prominent violin,swamping one song (4) L?E?
29 Across, It receives stimuli,even, possibly,in a fool (5,3) ????E ???
20 Down, Attacks on the rise-core of defence to gain resolve? (7) S?I?F??
22 Down, Historian turned up substantial matter of contention?not entirely (6)
?I?B??