Given a TODO that looks like this:

*** DONE put into spacemacs file
    CLOSED: [2018-08-04 Sat 21:18]
   :LOGBOOK:
    CLOCK: [2018-08-04 Sat 21:16]--[2018-08-04 Sat 12:18] =>  0:02
   :END:

What function will get me the parts in CLOCK: [2018-08-04 Sat
21:16]--[2018-08-04 Sat 12:18] =>  0:02, preferably in plist format like
the closed timestamp org-element-at-point gives back of:

(timestamp (:type inactive :raw-value "[2018-08-04 Sat 21:18]" :year-start
2018 :month-start 8 :day-start 4 :hour-start 21 :minute-start 18 :year-end
2018 :month-end 8 :day-end 4 :hour-end 21 :minute-end 18 :begin 46 :end 68
:post-blank 0)

Note org-element-at-point doesn't give back logbook information:

(headline (:raw-value "put into spacemacs file" :begin 1 :end 157
:pre-blank 0 :contents-begin 34 :contents-end 157 :level 3 :priority nil
:tags nil :todo-keyword #("DONE" 0 4 (fontified t face org-done))
:todo-type done :post-blank 0 :footnote-section-p nil :archivedp nil
:commentedp nil :post-affiliated 1 :closed (timestamp (:type inactive
:raw-value "[2018-08-04 Sat 21:18]" :year-start 2018 :month-start 8
:day-start 4 :hour-start 21 :minute-start 18 :year-end 2018 :month-end 8
:day-end 4 :hour-end 21 :minute-end 18 :begin 46 :end 68 :post-blank 0))
:title "put into spacemacs file"))

Thanks,

Cody