It's needed to pull boxing group into peak position (6)
I believe the answer is:
towbar
'it's needed to pull boxing group' is the definition.
I can't tell whether this definition defines the answer.
'into peak position' is the wordplay.
'into' means one lot of letters goes inside another.
'peak' becomes 'tor' (a tor is a rocky peak).
'position' becomes 'wba' (I can't justify this - if you can you should give a lot more credence to this answer).
'tor' going around 'wba' is 'TOWBAR'.
Can you help me to learn more?
(Other definitions for towbar that I've seen before include "Caravan etc. attachment" , "Trailer attachment" , "Caravan fixing point" , "Caravan connector" , "Bow rat (anag.)" .)