Storyteller returning to complain bitterly (4)
I believe the answer is:
rail
'complain bitterly' is the definition.
(I've seen this before)
'storyteller returning' is the wordplay.
'storyteller' becomes 'liar' (I've seen this before).
'returning' shows that the letters should be reversed in order.
'liar' back-to-front is 'RAIL'.
'to' acts as a link.
(Other definitions for rail that I've seen before include "Barrier around lair" , "A bird; bar to hang on" , "Bird with long legs" , "Scold, berate" , "Bar - marsh bird" .)