Explosive new book describing dates with former England footballer (10)
I believe the answer is:
incendiary
'explosive' is the definition.
'new book describing dates with former england footballer' is the wordplay.
'new' becomes 'n'.
'book describing dates' becomes 'diary'.
'with' says to put letters next to each other.
'former england footballer' becomes 'ince' (Paul Ince).
'n'+'diary'='ndiary'
'ndiary' after 'ince' is 'INCENDIARY'.
(Other definitions for incendiary that I've seen before include "Inciting riot" , "Fire-raiser" , "of a provocative nature" , "tending to stir up trouble" , "Likely to stir up trouble" .)