Yonks

7 clues
Ages
Ages (slang)
Donkey's years!
Years and years
Many years (slang)
Long time (informal)
Very long time (slang)
Similar answers:
40winks
Aarpvpoksbyob
Abneryokum
Aboutyou
Aboveandbeyond
Acanyon
Acomedyoferas
Acomedyoferrors
Aconfederacyofdunes
Actingmayor
Actyourage
Adayold
Adisrightforyou
Adofjohnandyoko
Aerialyoga
Afinehowdoyoudo
Aforcebeyondcalculation
Afteryou
Afteryouleave
Afteryouvegot