Praising Our Lady at Barking (9)
I believe the answer is:
laudatory
'praising' is the definition.
('laudatory' can be a synonym of 'praising')
'our lady at barking' is the wordplay.
'barking' indicates an anagram (UK slang for mad).
'our'+'lady'+'at'='ourladyat'
'ourladyat' anagrammed gives 'LAUDATORY'.
(Other definitions for laudatory that I've seen before include "puffing" , "Expressing praise and commendation" , "Full of praise" , "Eulogistic" .)