Bed-bound types holding record for splits (7)
I believe the answer is:
departs
'bed-bound types' is the definition.
I can't tell whether this definition defines the answer.
'record for splits' is the wordplay.
'record for' becomes 'de' (I can't explain this - if you can you should give a lot more credence to this answer).
'splits' becomes 'parts' ('part' can be a synonym of 'split').
'de'+'parts'='DEPARTS'
'holding' acts as a link.
Can you help me to learn more?
(Other definitions for departs that I've seen before include "Does runner" , "Goes away" , "Goes, leaves" , "Quits" .)