Look at one among mad axemen (7)
I believe the answer is:
examine
'look at' is the definition.
(synonyms)
'one among mad axemen' is the wordplay.
'one' becomes 'i' (Roman numeral).
'among' indicates putting letters inside.
'mad' is an anagram indicator.
'axemen' anagrammed gives 'examne'.
'i' placed into 'examne' is 'EXAMINE'.
(Other definitions for examine that I've seen before include "Analyse" , "Question closely" , "Look closely at < test" , "Inspect carefully" , "Inspect; question in court" .)