One's embraced by Sarah friskily — this is spicy stuff (7)
I believe the answer is:
harissa
'spicy stuff' is the definition.
(I know that harissa is spicy)
'one's embraced by sarah friskily' is the wordplay.
'one's' becomes 'i's' (Roman numeral).
'embraced by' is an insertion indicator.
'friskily' is an anagram indicator.
'sarah' is an anagram of 'harsa'.
'is' inserted into 'harsa' is 'HARISSA'.
'this is' is the link.
(Other definitions for harissa that I've seen before include "Hot North African sauce" , "Hot paste used in North African cuisine -- ass hair (anag)" , "Spicy sauce" .)