End outside the ditch finally sore, but unlikely to chang (10)
I believe the answer is:
entrenched
'unlikely to chang' is the definition.
I can't judge whether this defines the answer.
'end outside the ditch finally sore' is the wordplay.
'outside' indicates putting letters inside.
'the ditch' becomes 'trench' (trench is a kind of ditch).
'finally' suggests the final letters.
The final letter of 'sore' is 'e'.
'trench'+'e'='trenche'
'end' placed around 'trenche' is 'ENTRENCHED'.
'but' acts as a link.
Can you help me to learn more?
(Other definitions for entrenched that I've seen before include "Firmly established" , "Dug in" , "as certain troops were on Somme?" , "Difficult to shift" .)