Old commander elected for the second time? (5)
I believe the answer is:
again
'the second time?' is the definition.
(I've seen this before)
'old commander elected' is the wordplay.
'old commander' becomes 'aga' (historical Muslim military commander).
'elected' becomes 'in'.
'aga'+'in'='AGAIN'
'for' acts as a link.
(Other definitions for again that I've seen before include "second term" , "On the other hand" , "Moreover - a second time" , "Next time" , "'Another time, once more (5)'" .)