Take out old pamphlet (7)
I believe the answer is:
extract
'take out' is the definition.
(I know that take out can be written as extract)
'old pamphlet' is the wordplay.
'old' becomes 'ex' (prefix meaning former or onetime).
'pamphlet' becomes 'tract' (synonyms).
'ex'+'tract'='EXTRACT'
(Other definitions for extract that I've seen before include "concentration" , "Pull or take out - maybe a tooth" , "Extirpate" , "Passage taken from book etc" , "Cutting" .)