Enjoyment of father joining it for a night to begin with (8)

'enjoyment' is the definition.
(I know that fruition is a type of enjoyment)

'of father joining it for a night to begin with' is the wordplay.
I cannot really see how this works, but
'of' could be 'o' and 'o' is found in the answer.
'father' could be 'fr' (abbreviation as in a priest's title) and 'fr' is located in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?