Bar where person telling stories turned up (4)
I believe the answer is:
rail
'bar' is the definition.
(rail is a kind of bar)
'person telling stories turned up' is the wordplay.
'person telling stories' becomes 'liar' (I've seen this before).
'turned up' is a reversal indicator.
'liar' in reverse letter order is 'RAIL'.
'where' acts as a link.
(Other definitions for rail that I've seen before include "Form of transport" , "Length of track" , "wader" , "20 backwards, that 7 runs on" , "The Iron Horse road" .)