Operant

2 clues
Effective
In effect
Similar answers:
Aattheopera
Abandonshope
Aberrant
Aberrantly
Accountantshope
Adope
Adorant
Adorante
Adorants
Adulterant
Aerope
Aeroperu
Africanantelope
Againsttheropes
Ahope
Alangrant
Alexanderpope
Alexanderpopepaulvi
Alicecooper
Alicesrestaurant