Carefully analyse one French tool (6)
I believe the answer is:
unpick
'carefully analyse' is the definition.
'unpick' can be an answer for 'analyse' (I've seen this before). I am unsure of the 'carefully' bit.
'one french tool' is the wordplay.
'one french' becomes 'un'.
'tool' becomes 'pick' (pick is a kind of tool).
'un'+'pick'='UNPICK'
Can you help me to learn more?
(Other definitions for unpick that I've seen before include "subject to close scrutiny" , "analyse meticulously" , "Undo (stitches)" .)