Crossword Genius

Duty for this French military group (4,5)

Ross

I believe the answer is:

task force

'military group' is the definition.
(I've seen this before)

'duty for this french' is the wordplay.
'duty' becomes 'task' (task is a kind of duty).
'this french' becomes 'ce' (I've seen this in other clues).
'task'+'for'+'ce'='TASK-FORCE'

(Other definitions for task force that I've seen before include "Squad for undertaking" , "specially organised unit" , "Group specially organised for particular operation" , "Temporary unit to accomplish an objective" , "Temporary group to do a job" .)

I've seen this clue in The Telegraph.
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