Good gracious, is that the damned alarm? (5,5)
I believe the answer is:
hells bells
'the damned alarm?' is the definition.
The definition suggests a singular noun which matches the answer.
'good gracious is' is the wordplay.
I cannot quite see how this works, but
'is' could be 'be' and 'be' is located in the answer.
This explanation may well be incorrect...
'that' is the link.
Can you help me to learn more?
(Other definitions for hells bells that I've seen before include "Those with a ring of fire" , "dammit?" .)