Old fox from period looking back? (3)
I believe the answer is:
tod
'old fox' is the definition.
'tod' can be an answer for 'fox' (historic term). I am unsure of the 'old' bit.
'period looking back?' is the wordplay.
'period' becomes 'dot' (as in a full stop).
'looking back?' says the letters should be written backwards.
'dot' in reverse letter order is 'TOD'.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for tod that I've seen before include "If you're on it, you're on your own" , "Former English weight for wool - dot it" , "Fox" , "One's alone on this" , "Sly person" .)