Pamphlet cleverly put together in a manageable way (9)
I believe the answer is:
tractably
'in a manageable way' is the definition.
I can't tell whether this definition defines the answer.
'pamphlet cleverly put together' is the wordplay.
'pamphlet' becomes 'tract' (synonyms).
'cleverly' becomes 'ably' (I can't explain this - if you can you should believe this answer much more).
'put together' says to put letters next to each other.
'tract'+'ably'='TRACTABLY'
Can you help me to learn more?
(Another definition for tractably that I've seen is " in easily manageable way".)