I have the DT in front of me, so to clear up any misunderstandings:-
5d. Blended rye a tramp slyly kept in rug. (6&3) = Prayer Mat (anagram)
5a Collect dull rug (7) P-O-E-R. (obviously a misprint)
Thanks dannyk. I knew what you were saying- it's Pentire and Penelope who have said there was a mistake in their paper. Penelope has now told us what her paper says
it's really very simple. The clues in the online version are correct. The editor had a revised clue for 5 down but he put it into 5 across by mistake in the newspaper version. The net result was that there were two clues for 5 down and none for 5 across.