Joint nearly caught in hoop causing annoyance (8)
I believe the answer is:
rankling
'causing annoyance' is the definition.
(I've seen this before)
'joint nearly caught in hoop' is the wordplay.
'joint' becomes 'ankle' (ankle is a kind of joint).
'nearly' means to remove the last letter.
'caught in' means one lot of letters goes inside another.
'hoop' becomes 'ring' (I've seen this before).
'ankle' with its final letter taken off is 'ankl'.
'ankl' inserted into 'ring' is 'RANKLING'.
(Other definitions for rankling that I've seen before include "Causing endless annoyance" , "causing some bitterness" , "causing resentment" , "annoying" , "vexing" .)