The revolutionary to jog the heavens? (7)
I believe the answer is:
trotsky
'the revolutionary' is the definition.
(Russian revolutionary Leon Trotsky)
'jog the heavens?' is the wordplay.
'jog' becomes 'trot' (synonyms).
'the heavens?' becomes 'sky' (sky is a kind of heavens).
'trot'+'sky'='TROTSKY'
'to' acts as a link.
(Other definitions for trotsky that I've seen before include "Leon --, early Marxist" , "Revolutionary ousted by Stalin" , "Marxist leader" , "Revolutionary murdered in Mexico" , "Russian assassinated in nineteen forty" .)