Loyal kid, finding bone to pick? (4,3)
I believe the answer is:
true rib
'bone to pick?' is the definition.
(true rib is a type of bone)
'loyal kid' is the wordplay.
'loyal' becomes 'true' (I've seen this in another clue).
'kid' becomes 'rib' (both can mean to tease or mock).
'true'+'rib'='TRUE RIB'
'finding' is the link.
(Other definitions for true rib that I've seen before include "One attached directly to sternum" , "part of body" , "under the skin" , "Bone attached to the breastbone" , "fixed bone" .)