Soldier on manoeuvres not comprehending international language (3,5)
I believe the answer is:
old norse
'language' is the definition.
(Old Norse is an example)
'soldier on manoeuvres not comprehending international' is the wordplay.
I cannot really understand how this works, but
'soldier' could be 'or' (soldier from Other Ranks) and 'or' is found within the answer.
'not' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for old norse that I've seen before include "Extinct Germanic language" , "Medieval Scandinavian language" , "Ancient Scandinavian language" .)
