\version "2.13.0"

#(define-markup-command (T-circle layout props) ()
   (interpret-markup layout props (markup #:circle "T")))
   
#(define-markup-command (fingernail layout props) ()
   (interpret-markup layout props
    (markup #:stencil
     (ly:make-stencil
      (list 'embedded-ps
       (string-append "1.6 1.5 0.4 1.5 0 0 2 0\n"
                      "0.4 0.75 1.6 0.75 2 0 0 0\n"
                      "0.15 draw_bezier_sandwich\n"))
       '(0 . 2)
       '(0 . 1.75)))))

\relative {
   \key f \major
   \time 2/4
   
   \override NoteHead #'style = #'cross
   \override TextSpanner #'(bound-details left text) =
     \markup { \upright "Pdlt  " }
   % move TextSpanner above markups:
   \override TextSpanner #'outside-staff-priority = #451

   f16^\markup { \right-align \T-circle
                 \fingernail
                 \small "(ou articulations)" }
       \startTextSpan f f f f8 f |
   f16 f f f f8 f |
   f16 f f f f4 \stopTextSpan |
   \revert NoteHead #'style    
}