Spies with foreign plot involved have accents (10)
I believe the answer is:
spotlights
'accents' is the definition.
(spotlighting is a kind of accenting)
'spies with foreign plot involved' is the wordplay.
'spies with' becomes 'sights' (to spy can mean to spot or sight. I am not sure about the 'with' bit.).
'foreign' indicates an anagram (foreign order of the letters).
'involved' is an insertion indicator.
'plot' anagrammed gives 'potl'.
'sights' enclosing 'potl' is 'SPOTLIGHTS'.
'have' is the link.
Can you help me to learn more?
(Another definition for spotlights that I've seen is " Focuses attention on".)