Antipathy from states about to besiege India (8)
I believe the answer is:
aversion
'antipathy' is the definition.
(I know that antipathy can be written as aversion)
'states about to besiege india' is the wordplay.
'states' becomes 'avers' (to aver is to declare or state).
'about' becomes 'on' (as in a book 'on' a certain topic).
'to besiege' means one lot of letters goes inside another.
'india' becomes 'i' (phonetic alphabet: alpha, bravo, charlie etc.).
'avers'+'on'='averson'
'averson' placed around 'i' is 'AVERSION'.
'from' acts as a link.
(Other definitions for aversion that I've seen before include "Strong dislike for, makes you look away" , "serious dislike" , "A feeling of dislike or reluctance" , "A strong dislike or antipathy" , "phobia" .)