Eiffel Tower's city (5)
I believe the answer is:
paris
'eiffel tower's city' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for paris that I've seen before include "Prince who abducted Helen, starting a long war (see 8)" , "Old prince" , "'''I love ... in the springtime'' (Cole Porter) (5)'" , "French capital - Trojan prince" , "where he got plastered?" .)