Holing

2 clues
___ up (in hiding)
Out of sight, with "up
Similar answers:
Aaarating
Aahing
Aameeting
Aameetings
Aaronspelling
Abadending
Abandoning
Abashing
Abasing
Abathingbeauty
Abating
Abbashitsingle
Abbreviating
Abclistening
Abducting
Abetting
Abhorring
Abiding
Abidingfaith
Abinge