Gentleman to escort a lady (6)
I believe the answer is:
squire
This could be a double definition.
'gentleman' is the first definition.
(I've seen this before)
'escort a lady' is the second definition.
'squire' can be an answer for 'escort' (squiring is a kind of escorting). I'm not certain of the 'a lady' bit.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for squire that I've seen before include "Chief landowner of an area" , "Local landowner; knight's attendant" , "Old landowner" , "Country gentleman" , "[PILGRIM in the CANTERBURY TALES]" .)