16D One knows they're there but Antrim is not one of them. 5 letters: _NTR_ 27A What you need to have to get 22 across. (22A Get around the sound of the phone call from Wagner. 3,4: THE RING).3 letters: _AR. Is the answer PAR? Can someone please explain the sense of the answer? 27D The swallow does this as a matter of course. 4,2: _A_S_P. (First letter depends on answer to 27A, P?, PASS UP?) 10A It's not Santa that's got claws for the feast. 7 letters: L_B_T_R. LOBSTER fits but I can't see the sense of the answer.