You may have seen the last one in Paris (5)
I believe the answer is:
tango
'you may' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'seen the last one in paris' is the wordplay.
I cannot quite understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is present in the answer.
'last' could be 'go' (synonyms) and 'go' is present in the answer.
'one' could be 'an' (an apple is one apple) and 'an' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'have' is the link.
Can you help me to learn more?
(Other definitions for tango that I've seen before include "Dance music" , "tee" , "Dramatic ballroom dance from Argentina" , "Dance originally from Buenos Aires" , "one followed by uniform" .)