Any hints for my last three, please? I think they are thematic, as I haven't fitted in G, H or N so far, so there will be no definition (and it will start G- or end -G etc.)
26d Bigwig entering Switzerland? On the contrary (5)
?C??X
(not positive about the X)
(these cross)
48a State loo (7)
?a?e?*?
45d Supplies troughs of sweet-smelling flowers (6)
?*?C?S
* - crossing letter