Salute American uncle going around Los Angeles academy (6)
'salute' is the definition.
(salaaming is a kind of saluting)
'american uncle going around los angeles academy' is the wordplay.
'american uncle' becomes 's am' (I've seen this before).
'going around' means one lot of letters goes inside another.
'los angeles' becomes 'la'.
'academy' becomes 'a' (abbreviation for academy).
'sam' enclosing 'laa' is 'SALAAM'.
(Other definitions for salaam that I've seen before include "Eastern greeting", "Oriental bow and salutation", "Oriental salutation meaning peace", "An Oriental salute or bow", "Greetings".)