In __ to: deeply engrossed in (6)
I believe the answer is:
thrall
(Other definitions for thrall that I've seen before include "Slave, servant, captive" , "Slave(ry)" , "Bondage, enslavement" , "captivity" , "State of servitude" .)
I believe the answer is:
thrall
(Other definitions for thrall that I've seen before include "Slave, servant, captive" , "Slave(ry)" , "Bondage, enslavement" , "captivity" , "State of servitude" .)