Relatives of diplomats with cold, uncovered flesh (6)
I believe the answer is:
uncles
'relatives' is the definition.
(uncle is a kind of relative)
'diplomats with cold uncovered flesh' is the wordplay.
'diplomats with' becomes 'un' (I can't explain this - if you can you should give a lot more credence to this answer).
'cold' becomes 'C' (eg on taps).
'uncovered' indicates the central letters.
The centre of 'flesh' is 'les'.
'un'+'c'+'les'='UNCLES'
'of' is the link.
Can you help me to learn more?
(Other definitions for uncles that I've seen before include "Helper who looks after another person" , "Kinsmen" , "Older male relatives" , "Relations" .)