The bare bones of our natural history perhaps to ponder at university on Medium-Sized Allotments (6-6)

'the bare bones of our natural history perhaps' is the definition.
I know nothing about this answer so I can't judge whether this works.

'ponder at university on medium-sized allotments' is the wordplay.
'ponder' becomes 'muse' (synonyms).
'at university' becomes 'up' (slang term meaning at university).
'on' means one lot of letters goes inside another (as in clothing 'on' a person).
'medium-sized' becomes 'm' (clothes size).
'allotments' becomes 'ieces' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'up' enclosing 'm' is 'ump'.
'muse'+'ump'+'ieces'='MUSEUM-PIECES'

'to' is the link.

Can you help me to learn more?