Right little devil chasing quiet diminutive person? (6)
I believe the answer is:
shrimp
'diminutive person?' is the definition.
(I've seen this before)
'right little devil chasing quiet' is the wordplay.
'right' becomes 'r' (common abbreviation).
'little devil' becomes 'imp' (I've seen this before).
'chasing' is a charade indicator (letters next to each other).
'quiet' becomes 'sh'.
'r'+'imp'='rimp'
'rimp' put after 'sh' is 'SHRIMP'.
(Other definitions for shrimp that I've seen before include "Crustacean; small child" , "Small edible crustacean" , "tiny chap" , "tiny fellow!" , "Tot" .)