Tense with father and son getting agreement finally (4)
I believe the answer is:
past
'tense' is the definition.
(past is a kind of tense)
'with father and son getting agreement finally' is the wordplay.
'with' says to put letters next to each other.
'father' becomes 'pa' (pa can mean dad or father).
'and' means one lot of letters go next to another.
'son' becomes 's' (genealogical abbreviation for son).
'getting agreement finally' becomes 't' (I can't justify this - if you can you should give a lot more credence to this answer).
'pa'+'s'='pas'
'pas' put next to 't' is 'PAST'.
Can you help me to learn more?
(Other definitions for past that I've seen before include "tense" , "Days gone by" , "The time that has elapsed" , "A person's earlier life history" , "Beyond" .)