Crossword Genius

Being very firm — or cracking? (10)

Ross

I believe the answer is:

resolution

I believe this is a double definition.

'being very firm' is the first definition.
(being resolved or firm)

'cracking?' is the second definition.
(thesaurus)

'or' acts as a link.

(Other definitions for resolution that I've seen before include "Clarifying" , "Firmness - outcome of decision making" , "Firm decision" , "sorting out of problem" , "Verdict" .)

I've seen this clue in The Times.
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