Make sense of price he'd worked out (8)
I believe the answer is:
decipher
'make sense of' is the definition.
(I've seen this before)
'price he'd worked out' is the wordplay.
'worked out' indicates anagramming the letters.
'price'+'hed'='pricehed'
'pricehed' is an anagram of 'DECIPHER'.
(Other definitions for decipher that I've seen before include "Make out meaning of coded message" , "Convert from code into plain language" , "Break code" , "Make sense of" , "Convert from code to text" .)