13 across (7) E___E_D Great brain _ mine familiarly enjoyed acquiring bit of erudition. 9 down (6) (8) _A___T _R_C_I_E Worked out great tactic per training session for the Gunners. 17 down (8) _O_C_P_S Ideas from music shows with piano not right.
Many thanks to all who replied. Perhaps it`s just me but the DT crossword compilers seem to be getting steadily more bent and twisted - often even when I`ve got the answer, I can`t really see why. Never used to be like this - perhaps it`s anno domini (mine!).