Work out meatiest recipe (8)
I believe the answer is:
estimate
'work out' is the definition.
(I know that estimate is a type of work out)
'meatiest recipe' is the wordplay.
'recipe' indicates an anagram.
'meatiest' anagrammed gives 'ESTIMATE'.
(Other definitions for estimate that I've seen before include "Judge the approximate cost of" , "Judgment, appraisal" , "Statement giving the likely cost of a job" , "Reckon value" , "Quotation" .)