Rogue -- troubled parson is about to phone one (11)
I believe the answer is:
rapscallion
'rogue' is the definition.
('rapscallion' can be a synonym of 'rogue')
'troubled parson is about to phone one' is the wordplay.
'troubled' indicates anagramming the letters.
'is about' indicates putting letters inside.
'to phone one' becomes 'calli' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'parson' with letters rearranged gives 'rapson'.
'rapson' placed around 'calli' is 'RAPSCALLION'.
Can you help me to learn more?
(Other definitions for rapscallion that I've seen before include "mischief maker" , "Terror" , "Disreputable person - local sprain (anag)" , "Monkey" , "Plain carols (anag) - rogue" .)