call-out 
noun
1An instance of being summoned to deal with an emergency or do repairs: [as modifier]: a call-out charge...
- He said they received an emergency call-out for windows to be boarded up and other repairs before any further problems at the site.
- The Rural Doctors Association of WA is not entirely satisfied with the $1000 a week allowance made for emergency call-outs.
- There were 1,047 emergency call-outs and the charity rescued 833 wild creatures with 598 being released unharmed or set free after treatment.
2 Printing A letter, word, number, or symbol identifying an illustration or a specific part of one.
2.1A short piece of text set in larger type than the rest of the page and intended to attract attention.
- be one's own worst enemy
- be on firm ground
- be on nodding terms
- be on one's best behaviour
- be on one's mettle
- be on one's way
- be on (or on to) a loser
- be on someone's (own) head
- be on the lookout (or keep a lookout) for
- be on the offensive
- be on the rag
- be on the take
- be on the watch
- be on the wrong tram
- be on to a good thing
- be on to someone
- be on to something
- be open to debate
- be open with
- siphuncle
- Siphunculata
- SIPP
- sipper
- sippet
- sippy cup