Grouter

2 clues
Mason, at times
Tiler's assistant, perhaps
Similar answers:
Aboutacropgrower
Aboveground
Abovegroundpool
Absoluterulers
Accouter
Accoutering
Accouters
Acomputer
Acomputerdateis
Actorsgroup
Acuter
Adhocgroup
Afewgrouchymen
Agegroup
Aggro
Agro
Agroan
Agron
Agronom
Agronomic