Parisian tower (6)
I believe the answer is:
eiffel
'parisian tower' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for eiffel that I've seen before include "& 20 Across Paris landmark" , "Famous tourist tower in Paris" , "Parisian tower builder" , "French engineer famed for tower" , "Famous tower designer" .)