Trouble with hothead idiot, the French ... (6)
I believe the answer is:
hassle
'trouble' is the definition.
(I've seen this before)
'with hothead idiot the french' is the wordplay.
'with' is a charade indicator (letters next to each other).
'hothead' becomes 'h' (head letter of 'hot').
'idiot' becomes 'ass' (I've seen this before**).
'the french' becomes 'le'.
'h'+'ass' is 'hass'.
'hass'+'le'='HASSLE'
(Other definitions for hassle that I've seen before include "Informally, annoyance or quarrel" , "Hound" , "Annoying trouble" , "Lashes (anag)" , "Colloquial harassment or annoyance" .)