I'm a week behind ...
6d - Novel in French and Polish (5) S?E?N
7d - Authorising christening (9) E?T?T?I?G
34d - Stronghold chap's invested time in is no important (3,3,5) F?R ?H? B?R?? [been drivin me mad this one must be FOR THE something but can't see it!]
56a- Going around US research university spot Arab or Jew (6) ??M?T?