Clojure- How to emulate defun/s from Visual-Lisp Autocad?

(defun if_str(s386 elseuser / $rr tip) ;;_ASSERT_OK
........................
$rr)
(defun tmti_trpunct_rect_sav(fc / rr m dI c)
....................
rr)

(Defun t_ang_grad2rad(p120 / rr r)
  (dfn_pp_v1chk p120 "1real" "t_ang_grad2rad") (setq;|a331196|;
     r (t_ang_radcheck (/ (* p120 pi) 200.0))) 
...........................
rr)

(defun str_chr1a(n169 o169 q169 / rr)
  (setq;|a379465|;
     rr (if (str_l0 n169) "" (substr n169 o169 q169))) (if (=  n169 nil) (setq;|a379541|;
     rr "")) 
rr)