Revolutionary directions: encrust rich tart (10)
I believe the answer is:
cheesecake
'rich tart' is the definition.
(I've seen this before)
'revolutionary directions encrust' is the wordplay.
'revolutionary' becomes 'Che' (Che Guevara the Marxist revolutionary).
'directions' becomes 'ese' (east south east).
'encrust' becomes 'cake' (I've seen this in another clue).
'che'+'ese'+'cake'='CHEESECAKE'
(Other definitions for cheesecake that I've seen before include "Creamy tart" , "Sexy female photographs - rich sweet" , "Rich sweet tart" , "Dessert food" , "Provocative girls" .)