Small pampered pet (6)
I believe the answer is:
lapdog
'small pampered pet' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for lapdog that I've seen before include "One docile and subservient" , "One readily submitting" , "Pampered pet - sycophantic sidekick" , "Pom, for one" , "lackey" .)