Old Gal,
1. Think of a shortened version for "not bad"-2 letters
The word "round" in the clue hints that your answer for this is in the middle of the 5 letter word.
3. Another word(Irish slang, I believe) for an unpleasant smell.
4. The whole word means bunk - but not a bed as an earlier post on this thread has hinted at.
Also refer back to the posting made by Caravaggio if needed!
Hope this helps
NIMROD