Showing acumen, editor cut half of the content in guide, perhaps (6)
I believe the answer is:
mentor
'guide perhaps' is the definition.
'mentor' can be an answer for 'guide' (I've seen this in another clue). I am not sure about the 'perhaps' bit.
'showing acumen editor cut half of the content in' is the wordplay.
'showing acumen' becomes 'mn' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'cut half of' means to take half the letters.
'the' becomes 'definite article' ('the' is the definite article in English).
'content' means to look at the middle letters.
'in' indicates putting letters inside.
The centre of 'definitearticle' is 'e'.
'editor' with half the letters taken is 'tor'.
'mn'+'tor'='mntor'
'mntor' enclosing 'e' is 'MENTOR'.
Can you help me to learn more?
(Other definitions for mentor that I've seen before include "One guiding" , ""Guide, philosopher, and friend"" , "A wise and experienced teacher" , "Counsellor/guide" , "Merton (anag.)" .)