Bear for each in ditch (6)
I believe the answer is:
rupert
'bear' is the definition.
(fictional bear Rupert the Bear)
'each in ditch' is the wordplay.
'each' becomes 'per' ('per' can mean for each).
'in' means one lot of letters goes inside another.
'ditch' becomes 'rut' (rut is a kind of ditch).
'per' going within 'rut' is 'RUPERT'.
'for' acts as a link.
(Other definitions for rupert that I've seen before include "Prince" , "Boy" , "Poet who wrote of ..." , "Cartoon strip bear" , "Comic strip bear" .)