Daughter consumed dinner at first and went on outing with a guy (5)
I believe the answer is:
dated
'went on outing with a guy' is the definition.
I can't tell whether this defines the answer.
'daughter consumed dinner at first' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'consumed' becomes 'ate' (eating is a kind of consuming).
'at first' suggests taking the first letters.
The first letter of 'dinner' is 'd'.
'd'+'ate'+'d'='DATED'
'and' acts as a link.
Can you help me to learn more?
(Other definitions for dated that I've seen before include "Walked out with" , "Went steady" , "not without romantic engagements" , "Passe" , "Unfashionably old" .)