Approach daughter in a hole (6)
I believe the answer is:
advent
'approach' is the definition.
(I've seen this before)
'daughter in a hole' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'in' means one lot of letters goes inside another.
'hole' becomes 'vent' (vent is a kind of hole).
'a'+'vent'='avent'
'd' put inside 'avent' is 'ADVENT'.
(Other definitions for advent that I've seen before include "when the Christmas shopping has to be done?" , "Season preceding Christmas" , "when the Church year begins" , "Christmas shopping time in" , "Forty days preceding Christmas" .)