The marauder finishes up at the far end, possibly lower (7)
I believe the answer is:
prowler
'the marauder' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'finishes up at the far end possibly lower' is the wordplay.
'finishes' suggests the final letters (I've seen 'finish' mean this).
'at' says to put letters next to each other.
'end' suggests the final letters.
'possibly' indicates an anagram.
The last letter of 'up' is 'p'.
The final letter of 'far' is 'r'.
'lower' is an anagram of 'owler'.
'p'+'r'+'owler'='PROWLER'
Can you help me to learn more?
(Other definitions for prowler that I've seen before include "One moving stealthily" , "Person sneaking about with unlawful intentions" , "Person who roams about stealthily" , "Unwanted vagrant" , "Stealthy mover" .)