Has anyone else found today's crossword really trick? I have got four left (I think).
4d See former wife, one travelling far and wide on medical programme (6) E-E-E
7d Study image in it, in assembly (9) -D-----I-
11a Dandy who's employed to give lectures? (6)
13a Mate has row in English (6) -N---G
Can't see any of these - have I gone wrong somewhere? Any help gratefully received, as always.