Magician in Tyneside clubs, one telling fanciful lies (11)
I believe the answer is:
necromancer
'magician' is the definition.
(synonyms)
'tyneside clubs one telling fanciful lies' is the wordplay.
'tyneside' becomes 'ne' (region in North East of England).
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'one telling fanciful lies' becomes 'romancer' (someone who romanticises).
'ne'+'c'+'romancer'='NECROMANCER'
'in' acts as a link.
(Other definitions for necromancer that I've seen before include "Madame Arcati" , "Black artist" , "Sorcerer" , "magician" .)