Show public school journalist around (6)
I believe the answer is:
denote
'show' is the definition.
(thesaurus)
'public school journalist around' is the wordplay.
'public school' becomes 'eton' (I've seen this before).
'journalist' becomes 'ed' (short for editor).
'around' says the letters should be written backwards.
'eton'+'ed'='etoned'
'etoned' back-to-front is 'DENOTE'.
(Other definitions for denote that I've seen before include "Stand as symbol for" , "Be an indication of" , "Need to (anag) - indicate" , "Point" , "Indicate, signify" .)