Some find odd learner's easy task (6)
I believe the answer is:
doddle
'easy task' is the definition.
(I've seen this before)
'some find odd learner's' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'DODDLE' can be found hidden inside 'find odd learners'.
(Other definitions for doddle that I've seen before include "Something easily done" , "Snip" , "Easy crossword?" , "In slang, an easy task" , "pushover" .)