Tart on side of Parisian street recalled French idler (7)
I believe the answer is:
flaneur
'french idler' is the definition.
(French term for someone who idly wanders around)
'tart on side of parisian street recalled' is the wordplay.
'tart' becomes 'flan' (I've seen this in another clue).
'on side of' says to put letters next to each other.
'parisian street' becomes 'rue' ('street' in French).
'recalled' shows that the letters should be reversed in order.
'rue' backwards is 'eur'.
'flan'+'eur'='FLANEUR'
(Other definitions for flaneur that I've seen before include "Man with much spare time" , "I stroll about" .)