Pick up Conservative leaflet (8)
I believe the answer is:
contract
'pick up' is the definition.
(I've seen this before)
'conservative leaflet' is the wordplay.
'conservative' becomes 'con' (I've seen this in other clues).
'leaflet' becomes 'tract' (I've seen this in other clues).
'con'+'tract'='CONTRACT'
(Other definitions for contract that I've seen before include "Promise" , "Agree - get smaller" , "Shrink in written agreement" , "Agreement - lessen" , "settlement" .)