Analyse (8)
(Other definitions for evaluate that I've seen before include "'Assess, appraise (8)'" , "Make an assessment of, measure" , "Judge the worth of something" , "Make an assessment of, determine worth" , "Reckon worth of" .)
'analyse' is the definition.
(dissect can mean to study or analyse)
This is the entire clue.
(Other definitions for dissect that I've seen before include "Critically examine" , "Cut up (for study)" , "Anatomize" , "Examine minutely" , "Cut open or cut apart" .)
'analyse' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for study that I've seen before include "Read to learn" , "Den; closely look at" , "Work-room" , "Office at home" , "Small office" .)
(Other definitions for sift that I've seen before include "Sieve finely" , "Put through a sieve" , "Analyse carefully in fist" , "Pass though a sieve" , "Distinguish as with a riddle" .)