Rude show entertains the Spanish (10)
I believe the answer is:
indelicate
'rude' is the definition.
(thesaurus)
'show entertains the spanish' is the wordplay.
'show' becomes 'indicate' ('indicate' can be a synonym of 'show'**).
'entertains' indicates putting letters inside.
'the spanish' becomes 'el'.
'indicate' placed around 'el' is 'INDELICATE'.
(Other definitions for indelicate that I've seen before include "Rude - tasteless" , "lacking taste" , "Practised (a play)" , "Coarse" , "Rather rude" .)