One shoe, not quite the pair, going with it (5)
I believe the answer is:
sabot
'one shoe' is the definition.
(I've seen this before)
'going with it' is the wordplay.
'going' becomes 'bot' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'with' means one lot of letters go next to another.
'it' becomes 'sa' (old-fashioned abbreviation for sex appeal).
'bot' put after 'sa' is 'SABOT'.
'not quite the pair' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
(Other definitions for sabot that I've seen before include "French clog" , "Carved shoe -- boats (anag)" , "Wooden-soled 13 down" , "This from last" , "Simple shoe" .)