Time to show Tramp (5)
I believe the answer is:
tread
'tramp' is the definition.
(I've seen this before)
'time to show' is the wordplay.
'time' becomes 't' (abbreviation).
'to show' becomes 'read' (synonyms).
't'+'read'='TREAD'
(Other definitions for tread that I've seen before include "dance" , "way of dancing" , "Sole of a shoe" , "Step (heavily)" , "Walk; part of tyre" .)