Boldly support religious school on Londonderry’s outskirts (8)
I believe the answer is:
brazenly
'boldly' is the definition.
(thesaurus)
'support religious school on londonderry's outskirts' is the wordplay.
'support' becomes 'bra' (a support for the breasts).
'religious school' becomes 'zen' (school of Buddhism).
'on' is a charade indicator (letters next to each other).
'outskirts' says to hollow out the word (remove centre letters) (I've seen 'outskirts of' mean this).
'londonderry' with its middle taken out is 'ly'.
'bra'+'zen'+'ly'='BRAZENLY'
(Another definition for brazenly that I've seen is " Boldly, shamelessly".)