Injured rear is holding five shows up (7)
I believe the answer is:
arrives
'shows up' is the definition.
(I've seen this in another clue)
'injured rear is holding five' is the wordplay.
'injured' is an anagram indicator.
'holding' is an insertion indicator.
'five' becomes 'V' (Roman numeral).
'rear'+'is'='rearis'
'rearis' with letters rearranged gives 'arries'.
'arries' enclosing 'v' is 'ARRIVES'.
(Other definitions for arrives that I've seen before include "Reaches destination" , "Comes" .)