25 across (5-4) Fit of fury attributable to liver unhesitatingly ?I???-F???
87 across (3,6) A Northern Democrat threatens mate to say nothing of payments made in America ?N?/??E?K?
78 across (5) Like Bitumen ,not soft and irritating ???H?
if you still need them...
answers I have are -
25 - fifty four (anag of fit of fury and part of the overall theme)
87 - and checks a+ND, checks as in chess, again part of the theme
78 - itchy