New keybinding `C-c C-x C-z' for `org-resolve-clocks'.

* org.el (org-mode-map): Bind `org-resolve-clocks' to `C-c C-x C-z'.

* org.texi (Resolving idle time): Document new keybinding.

Thanks to Joseph Thomas for suggesting this.

doc/org.texi

@@ -6319,7 +6319,7 @@ identical to dealing with away time due to idleness; it is just happening due
 to a recovery event rather than a set amount of idle time.
 
 You can also check all the files visited by your Org agenda for dangling
-clocks at any time using @kbd{M-x org-resolve-clocks}.
+clocks at any time using @kbd{M-x org-resolve-clocks RET} (or @kbd{C-c C-x C-z}).
 
 @subsubheading Continuous clocking
 @cindex continuous clocking

lisp/org.el

@@ -17836,6 +17836,7 @@ BEG and END default to the buffer boundaries."
 (org-defkey org-mode-map "\C-c\C-x\C-t" 'org-toggle-time-stamp-overlays)
 (org-defkey org-mode-map "\C-c\C-x\C-i" 'org-clock-in)
 (org-defkey org-mode-map "\C-c\C-x\C-x" 'org-clock-in-last)
+(org-defkey org-mode-map "\C-c\C-x\C-z" 'org-resolve-clocks)
 (org-defkey org-mode-map "\C-c\C-x\C-o" 'org-clock-out)
 (org-defkey org-mode-map "\C-c\C-x\C-j" 'org-clock-goto)
 (org-defkey org-mode-map "\C-c\C-x\C-q" 'org-clock-cancel)