Tramp removed from more uneven seaside attraction (4)
I believe the answer is:
pier
'seaside attraction' is the definition.
(structure by the sea)
'tramp removed from more uneven' is the wordplay.
'tramp' becomes 'bum' (both can mean a homeless person).
'removed from' indicates named letters should be taken away.
'more uneven' becomes 'bumpier' (I've seen this in another clue).
'bumpier' with 'bum' removed is 'PIER'.
(Other definitions for pier that I've seen before include "such as you might see at the seaside" , "Support for two adjacent bridge spans" , "Load-bearing pillar" , "Bridge pillar" , "Platform built out from the shore, supported on piles" .)