Type of steamer, capsized craft, borne by politician (5)
I believe the answer is:
tramp
'type of steamer' is the definition.
(I've seen this in another clue)
'capsized craft borne by politician' is the wordplay.
'capsized' says the letters should be written backwards.
'craft' becomes 'art' (both can mean cunning or trickery).
'borne by' says to put letters next to each other.
'politician' becomes 'MP' (Member of Parliament).
'art' in reverse letter order is 'tra'.
'tra'+'mp'='TRAMP'
(Other definitions for tramp that I've seen before include "Trudge; vagrant" , "Disreputable wanderer" , "Walk heavily or wearily" , "Mendicant" , "Walk heavily and firmly" .)