  The Compact Linear Collider (CLIC) is a proposed high-luminosity linear
electron-positron collider at the energy frontier. It is foreseen to be built
and operated in three stages, with a centre-of-mass energy ranging from a few
hundred GeV up to 3 TeV. The main beam-induced background impacting CLIC
physics analyses is produced by beamstrahlung radiation from the electron and
positron bunches traversing the high field of the opposite beam and converting
to hadrons. The timing selections are a powerful tool to discriminate signal
from background events at CLIC. For each CLIC stage, three sets of selections,
Loose, Selected, and Tight, are defined to allow the analysis of different
signal topologies. The selections are defined depending on the particle type
and the reconstructed polar angle of each particle flow object reconstructed
using the particle flow analysis. As a first step, the performance of the
timing selections currently defined for the CLIC 380 GeV energy stage are
evaluated using a $t\overline{t}$ sample decaying mainly into light quarks as
signal and $\gamma\gamma\to$hadron events as background. As a result, after
applying the selections the level of background is significantly reduced, down
to few GeV, while the shift of the signal peak to lower energy is kept within a
few percent. The cuts in the Loose selection are then relaxed to search for
possible improvements: in one of the options considered, the signal component
is partially recovered but also the background energy mean remains unchanged
with respect to not applying any cuts. In conclusion, no change is foreseen on
the timing selections.
