Fool with high explosive makes for cover (6)
I believe the answer is:
clothe
'for cover' is the definition.
('clothe' can be a synonym of 'cover')
'fool with high explosive' is the wordplay.
'fool' becomes 'clot' (I've seen this before).
'with' says to put letters next to each other.
'high explosive' becomes 'he'.
'clot'+'he'='CLOTHE'
'makes' is the link.
(Other definitions for clothe that I've seen before include "Provide cover for body and limbs" , "Provide with garments" , "apparel" , "Dress (someone)" , "Equip" .)