Keep on about one's right to have some of the chaps round (4)
I believe the answer is:
harp
'keep on about' is the definition.
(I've seen this before)
'right to have some of the chaps round' is the wordplay.
'right' becomes 'r' (abbreviation).
'to have' means one lot of letters go next to another.
'some of' says to take the centre (I've seen 'some' mean this).
'round' indicates an anagram.
The central letters of 'chaps' are 'hap'.
'r'+'hap'='rhap'
'rhap' anagrammed gives 'HARP'.
'one's' is the link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for harp that I've seen before include "Chordophone" , "Emblem of Ireland" , "Instrument for angel" , "semitone higher, abandoning intro" , "David's instrument" .)