Conservative on slope with journalist, restricted (7)
I believe the answer is:
cramped
'restricted' is the definition.
(cramping is a kind of restricting)
'conservative on slope with journalist' is the wordplay.
'conservative' becomes 'C' (UK political abbreviation).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'slope' becomes 'ramp' (I've seen this before).
'with' means one lot of letters go next to another.
'journalist' becomes 'ed' (short for editor).
'c'+'ramp'+'ed'='CRAMPED'
(Other definitions for cramped that I've seen before include "Being tight" , "Without enough room" , "Confined, crowded" , "With little room" , "Short of space" .)