At home possibly greet one or two? (7)
I believe the answer is:
integer
'two?' is the definition.
(two is a kind of integer)
'at home possibly greet' is the wordplay.
'at home' becomes 'in' (similar in meaning).
'possibly' indicates an anagram.
'greet' with letters rearranged gives 'teger'.
'in'+'teger'='INTEGER'
'one or' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for integer that I've seen before include "rational number remains" , "A whole number, not a fraction" , "One for example" , "Say one" , "The whole thing" .)