Part of skeleton in cupboard looks originally a crime involving lake (8)

'part of skeleton' is the definition.
'clavicle' can be an answer for 'part' (clavicle is a kind of part). I am not certain of the 'of skeleton' bit.

'cupboard looks originally a crime involving lake' is the wordplay.
'originally' suggests taking the first letters.
'crime' becomes 'vice' (vice crime is a kind of crime).
'involving' means one lot of letters goes inside another.
'lake' becomes 'L' (geographical abbreviation).
The first letters of 'cupboard looks' is 'cl'.
'vice' going around 'l' is 'vicle'.
'cl'+'a'+'vicle'='CLAVICLE'

'in' is the link.

Can you help me to learn more?