Ray has broken a foot! (5)
I believe the answer is:
shaft
'ray' is the definition.
(synonyms)
'has broken a foot' is the wordplay.
'broken' indicates anagramming the letters.
'a foot' becomes 'ft' ('ft' can be a synonym of 'foot').
'has' is an anagram of 'sha'.
'sha'+'ft'='SHAFT'
(Other definitions for shaft that I've seen before include "Mine access; handle" , "Spear handle; ray of sun" , "Aggressive remark" , "Handle - rod - passageway" , "Arrow; vertical mine entrance" .)