Señora Perón to chatter idly about nothing and vanish (9)
I believe the answer is:
evaporate
'vanish' is the definition.
(I know that vanish can be written as evaporate)
'senora peron to chatter idly about nothing' is the wordplay.
'senora peron' becomes 'eva' (I've seen this in another clue).
'to chatter idly' becomes 'prate' (I've seen this in another clue).
'about' is an insertion indicator.
'nothing' becomes 'O' (looks like zero - 0).
'prate' going around 'o' is 'porate'.
'eva'+'porate'='EVAPORATE'
'and' is the link.
(Other definitions for evaporate that I've seen before include "Change from liquid to vapour" , "Turn from liquid to vapour" , "vanish" , "go a stage further?" , "Turn liquid to gas" .)