Pull out old pamphlet (7)
I believe the answer is:
extract
'pull out' is the definition.
('extract' can be a synonym of 'pull out')
'old pamphlet' is the wordplay.
'old' becomes 'ex'.
'pamphlet' becomes 'tract' ('tract' can be a synonym of 'pamphlet').
'ex'+'tract'='EXTRACT'
(Other definitions for extract that I've seen before include "Passage selected from a larger work" , "Find out" , "Uproot by force" , "Short sample" , "Clipping" .)