
1) At home, but available 2) At the ready 3) Available 4) Available for duty 5) Available for emergencies 6) Available for service 7) Available for summoning 8) Available for work 9) Available if needed 10) Available in emergencies 11) Available on short notice 12) Available to come to work 13) Available to work
Found on
https://www.crosswordclues.com/clue/on-call
[Kings of Leon song] This picture was taken backstage after the 2005 Miss Earth pageant in the Manila, Philippines ...
Found on
http://en.wikipedia.org/wiki/On_Call_(Kings_of_Leon_song)

On call: In medicine, the person who is ready to respond, the one on duty. As in 'Who is the doctor on call this weekend?' or 'This is the on call schedule.'
Found on
http://www.medterms.com/script/main/art.asp?articlekey=39965
No exact match found.