Concentrates to see how primates move (8,4)

'concentrates' is the definition.
Although both the answer and definition are verbs in their -s form, I don't understand how they can define each other.

'see how primates move' is the wordplay.
I cannot quite understand how this works, but
'see' could be 'c' (the word for the letter, according to Chambers) and 'c' is found in the answer.
'move' could be 'do' (doing is a kind of moving) and 'do' is present in the answer.
This explanation may well be incorrect...

'to' acts as a link.

Can you help me to learn more?