Study WW1 battle in first course (8)
I believe the answer is:
consomme
'course' is the definition.
(I've seen this before)
'study ww1 battle in first' is the wordplay.
I cannot really see how this works, but
'study' could be 'con' (con can informally mean to study) and 'con' is found in the answer.
'battle' could be 'somme' (Somme is an example) and 'somme' is found in the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for consomme that I've seen before include "starter course" , "Clear French meat soup" , "stock product" , "Thin, clear soup" , "Clear soup usually of beef, veal or chicken" .)