Answered
Short cut
is there any Premiere shortcut can do this ?
trim select clip to playhead

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is there any Premiere shortcut can do this ?
trim select clip to playhead

->

For the example abowe, try Ctrl+Q.
No need to select the clip but you must be aware of which track you are trimming and make sure that the correct track is targeted, iow V1, V2, V3, etc, etc.
Ctrl+Q and Ctrl+W is for Extend Previous Edit to Playhead (Ctrl+Q) and Extend Next Edit to Playhead (Ctrl+W)
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