Black sheep first sucked into company game (6)
I believe the answer is:
crambo
'game' is the definition.
(I've seen this before)
'black sheep first sucked into company' is the wordplay.
I cannot quite see how this works, but
'black' could be 'b' (as in pencil classifications) and 'b' is located in the answer.
'sheep' could be 'ram' (ram is a kind of sheep) and 'ram' is found within the answer.
'company' could be 'co' (abbreviation) and 'co' is present in the leftover letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for crambo that I've seen before include "Rhyme" , "Rhyming word game" , "Parlour game involving finding rhymes to a given word" , "game for improvising" , "Rhyming game, car mob (a nag.)" .)