First pair of elephants together with antelope (5)
I believe the answer is:
eland
'antelope' is the definition.
(I know this)
'first pair of elephants together with' is the wordplay.
'first' means one lot of letters go next to another.
'pair of elephants' becomes 'el' (I can't justify this - if you can you should believe this answer much more).
'together with' becomes 'and' (and means together with or alongside).
'el'+'and' is 'ELAND'.
Can you help me to learn more?
(Other definitions for eland that I've seen before include "Large spiral-horned African antelope" , "Large African antelope with spiral horns" , "Large African deer with short spiral horns" , "One browses in the African plain" , "Led an (anag) -- antelope" .)