10 across - more green cordial (10) ????A?E?T
19 across - spots a radical interrupting 3 (7) ?A?A?O?
25 across - container ship on river with Jack in New York (9) P?N?I???S
4 down - I go up a hill following short French student (8) E???A?O?
5 down - bit of noxious air from bottom (6) N???E?
21 down - the 25 are on theses drugs (6) ?P???S