Easy to work with small composition (5)
I believe the answer is:
essay
'composition' is the definition.
(I've seen this in another clue)
'easy to work with small' is the wordplay.
'to work with' indicates an anagram (letters worked into a new order).
'small' becomes 's' (abbreviation - e.g. clothes size).
'easy' with its letters anagrammed with 's' makes 'ESSAY'.
(Other definitions for essay that I've seen before include "Try; dissertation" , "Attempt - piece of writing" , "Try - composition" , "Thesis" , "School compeosition" .)