Perceive some French weep (6)
I believe the answer is:
descry
'perceive' is the definition.
(thesaurus)
'some french weep' is the wordplay.
'some french' becomes 'des'.
'weep' becomes 'cry' ('cry' can be a synonym of 'weep').
'des'+'cry'='DESCRY'
(Other definitions for descry that I've seen before include "See" , "Catch sight of (poetic)" , "Perceive - make out" .)