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All answers having "Holy ___!" as clue:

3 Character Answers:

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COW

OIL

OMG

RHO

SEE



4 Character Answers:

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CRAP

HORN

MOLY

PETE

SICK

SIGH

WRIT



5 Character Answers:

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ARIES

BLEST

GRAIL

PIOUS



6 Character Answers:

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DIVINE

SACRAL

SACRED

TERROR

TOLEDO



7 Character Answers:

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ANGELIC

BLESSED

OUTCOME

SAINTED

SAINTLY



8 Character Answers:

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CASTIRON

HALLOWED



9 Character Answers:

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OFFCOLOUR



10 Character Answers:

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SANCTIFIED