Too involved in Laos? (4)
I believe the answer is:
also
'too' is the definition.
(synonyms)
'involved in laos?' is the wordplay.
'involved in' is an anagram indicator (involved can mean complex or confusing).
'laos' anagrammed gives 'ALSO'.
(Other definitions for also that I've seen before include "Plus" , "on top" , "in accompaniment" , "admitted to Royal Society > too" , "What's more" .)