IBM 5110 User Manual page 162

You can cleat a suspension by entering a branch with no argument
(that is, -+). One
susp~nded
function is cleared at a time, along with
any pendent functions for that suspended function. The first branch
clears the most recently suspended function, as in the following
example:
"t
)SI
H['?] ,)(.
G[;.:,~]
F[~~)J
It is a good practice to clear suspended functions, because suspended
functions use available storage in the active workspace. Repeated use
of -+ clears all the suspended functions; as the functions are cleared,
they are removed (cleared) from the state indicator. When the state
indicator is completely cleared, the state indicator display is a blank
line.
Note: To display the state indicator with local names, enter the )SINL
command.
Debugging and Error Recovery Techniques 157