A leftist inclination? (4)
I believe the answer is:
list
'inclination?' is the definition.
(list can mean to tilt, lean or incline)
'a leftist' is the wordplay.
I cannot quite see how this works, but
'leftist' could be 'l' and 'l' is present in the answer.
The remaining letters 'ist' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for list that I've seen before include "Heel - catalogue" , "Desire" , "choice" , "Catalogue; tilt" , "Pay attention" .)