Uandi

4 clues
Us, in a text msg
We, on a candy heart
We, in a text message
1991 Nicholson Baker book
Similar answers:
Aarondirtylaundry
Abadending
Abandits
Ablastingindisguise
Aboundin
Abounding
Aboutaquarterto
Abrahamandisaac
Absconding
Accentuate
Accentuates
Accrual
Accruals
Achua
Acidindigestion
Aconcagua
Acornsquash
Acqua
Acquaint
Acquaintance