Shelter behind this person in affray (5)
I believe the answer is:
melee
'affray' is the definition.
(I've seen this before)
'shelter behind this person' is the wordplay.
'shelter' becomes 'lee' (I've seen this before).
'behind' says to put letters next to each other.
'this person' becomes 'me' (I've seen this in other clues).
'lee' put after 'me' is 'MELEE'.
'in' acts as a link.
(Other definitions for melee that I've seen before include "confused group" , "Confused fight or scuffle" , "A confused fight or muddle" , "Scrimmage" , "Confused conflict, affray" .)