Fashion items around posh Hollywood area for model (8)
I believe the answer is:
simulate
'for model' is the definition.
(synonyms)
'fashion items around posh hollywood area' is the wordplay.
'fashion' is an anagram indicator.
'around' means one lot of letters goes inside another.
'posh' becomes 'u' (abbreviation for upper-class - opposite to non-U).
'hollywood area' becomes 'LA'.
'items' is an anagram of 'simte'.
'u'+'la'='ula'
'simte' enclosing 'ula' is 'SIMULATE'.
(Other definitions for simulate that I've seen before include "Imitate form or conditions of" , "pretend" , "Feign" , "Imitate the form or condition of" , "Reproduce conditions of by means of model" .)