Couple making king new centre of family tree (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

LIN e AGE (family tree) making K (king) the new centre. It wasn’t until we were writing up the blog that we realised that we had the incorrect answer. We do feel though that our parsing works as well – LIN k AGE (couple) changing K (king) into E (the ‘centre’ of new) – The definition in our parsing would be ‘of family tree’