Favouring the right time to invest in retailer, one providing accounts (11)
I believe the answer is:
storyteller
'one providing accounts' is the definition.
(a storyteller provides an account of something)
'favouring the right time to invest in retailer' is the wordplay.
'favouring the right' becomes 'Tory' (the Conservative Party are the Tories).
'time' becomes 't' (abbreviation).
'to invest in' means one lot of letters goes inside another.
'retailer' becomes 'seller' (I've seen this in another clue).
'tory'+'t'='toryt'
'toryt' going within 'seller' is 'STORYTELLER'.
(Other definitions for storyteller that I've seen before include "novelist?" , "Relater of tales; liar" , "he retails pork pies" , "Narrator (possibly a liar?)" , "Narrator of tale, liar" .)