Interpretation of old love, for example, key to what's part of family life (8)
I believe the answer is:
exegesis
'interpretation' is the definition.
(exegesis is a kind of interpretation)
'old love for example key to what's part of family life' is the wordplay.
I cannot really see how this works, but
'old' could be 'ex' and 'ex' is found within the answer.
'example' could be 'eg' and 'eg' is present in the answer.
'key' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
'part' could be 'si' (si is a kind of part) and 'si' is found within the answer.
A single letter 's' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for exegesis that I've seen before include "Critical expounding of e.g. Bible" , "critical description" , "Critical commentary" , "Critical interpretation (of scripture)" , "Critical explanation of, eg, scripture" .)