Salient, good point following a lot of rubbish (5)
I believe the answer is:
bulge
'salient' is the definition.
(salient can mean a bulging bit of land)
'good point following a lot of rubbish' is the wordplay.
'good point' becomes 'ge' (I can't justify this - if you can you should give a lot more credence to this answer).
'following' means one lot of letters go next to another.
'a lot of' means to remove the last letter (most of the word but not all of it).
'rubbish' becomes 'bull' (both can mean nonsense).
'bull' with its final letter taken off is 'bul'.
'ge' put after 'bul' is 'BULGE'.
(Other definitions for bulge that I've seen before include "Battle of the -----: last major German counter-offensive of WWII (1944)" , "Rounded swelling" , "Hump" , "Hitler's offensive" , "Swelling - sudden increase" .)