Hello all, help needed with last four please, 4d) security feature at front lacks page for PR material (3-2) t?e-?n.
11a) she's hardly even noticed at the start (3) h?n.
15d) cowboys accents beginning to disappear (5) r???e
17a) Greeks eaten one? He's beyond recovery (5) ??n?r is it goner?
Today's crossword has taken me ages to do :-( so any help much appreciated.