The French turns in show getting rude (10)
I believe the answer is:
indelicate
'rude' is the definition.
(thesaurus)
'the french turns in show' is the wordplay.
'the french' becomes 'le'.
'turns' shows that the letters should be reversed in order.
'in' is an insertion indicator.
'show' becomes 'indicate' ('indicate' can be a synonym of 'show'**).
'le' in reverse letter order is 'el'.
'el' inserted inside 'indicate' is 'INDELICATE'.
'getting' acts as a link.
(Other definitions for indelicate that I've seen before include "Rather rude" , "Rude - tasteless" , "Practised (a play)" , "Coarse" , "lacking taste" .)