River runs through camping shelter (5)
I believe the answer is:
trent
'river' is the definition.
(I've seen this before)
'runs through camping shelter' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'through' means one lot of letters goes inside another (I've seen this in other clues).
'camping shelter' becomes 'tent' (I've seen this before).
'r' put inside 'tent' is 'TRENT'.
(Other definitions for trent that I've seen before include "River through Newark" , "River flowing through Nottingham" , "Major English river" , "River at Newark/Stoke" , "Nottingham's river" .)