Joints and spotted dick finally returned (5)
I believe the answer is:
knees
'joints' is the definition.
(knee is a kind of joint)
'spotted dick finally returned' is the wordplay.
'spotted' becomes 'seen' (I've seen this before**).
'finally' indicates one should take the final letters.
'returned' shows that the letters should be reversed in order.
The last letter of 'dick' is 'k'.
'seen'+'k'='seenk'
'seenk' written backwards gives 'KNEES'.
'and' acts as a link.
(Other definitions for knees that I've seen before include "Legs' joints" , "Hinged joints" , "Hinge joints" , "Leg joints" , "Lap" .)