Lacking guile and disastrously two down hosting the French (7)
I believe the answer is:
artless
'lacking guile' is the definition.
(I've seen this in another clue)
'disastrously two down hosting the french' is the wordplay.
'disastrously two down' becomes 'arts' (I can't explain this - if you can you should give a lot more credence to this answer).
'hosting' is an insertion indicator (inserted letters are welcomed in or hosted).
'the french' becomes 'les' (plural form of 'the' in French).
'arts' placed around 'les' is 'ARTLESS'.
'and' is the link.
Can you help me to learn more?
(Other definitions for artless that I've seen before include "Free from cunning" , "Simple and natural in manner" , "Simple, unaffected" , "Ingenuous" , "Without pretension" .)