Sword turns up in Dundee perhaps (4)
I believe the answer is:
epee
'sword' is the definition.
(epee is a kind of sword)
'turns up in dundee perhaps' is the wordplay.
'turns up' is a reversal indicator.
'in' indicates a hidden word.
'eepe' is hidden in the letters of 'dundee perhaps'.
'eepe' back-to-front is 'EPEE'.
(Other definitions for epee that I've seen before include "Fencer's weapon" , "Olympic event" , "Foil for riposte" , "Narrow fencing sword" , "Fighting blade" .)