'Facile!' as was written about current member with agenda (10)
I believe the answer is:
simplistic
'facile' is the definition.
(facile can mean simplistic or superficial)
'as was written about current member with agenda' is the wordplay.
'as was written' becomes 'sic' ('sic' is used to indicate an error in a quotation).
'about' means one lot of letters goes inside another.
'current member' becomes 'imp' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'with' says to put letters next to each other.
'agenda' becomes 'list' (I've seen this in another clue).
'imp'+'list'='implist'
'sic' going around 'implist' is 'SIMPLISTIC'.
(Other definitions for simplistic that I've seen before include "Not recognising true complexity" , "Naive; ignoring complexities" , "Ignoring real complexity" .)