Crossword Genius

Is the restraint in that spot? (7)

Ross

I believe the answer is:

therein

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'in that spot?' is the definition.
Both the answer and definition are adverbs. Perhaps you can see a link between them that I can't see?

'is the restraint' is the wordplay.
'restraint' becomes 'rein' (I've seen this before).
'the'+'rein'='THEREIN'

Can you help me to learn more?

(Other definitions for therein that I've seen before include "Inside that" , "in that respect" , "enclosed by that place?" , "Neither (anag) - into that" .)

I've seen this clue in the Sydney Morning Herald.
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