I am having problems with 4d and 14A.
Hint on either one may give me the other one as they cross.
4D. Two-adjacent symbols from grid changed before 1200H (6)
DI??A?
Looks like anagram of grid and 1200H could be Noon.
14a. is thematic. One letter to be removed before entry.
Staff on board railroad (6) ??E?E
Thanks.