CLEAR Opcode?

From the Softcopy:
11.20.14 CLEAR (Clear) 
+------------------------------------------------------------------------+
¦   Code   ¦     Factor 1    ¦      Factor 2      ¦   Result  ¦
Indicator¦
¦          ¦                 ¦                    ¦   Field   ¦         
¦
+----------+-----------------+--------------------+-----------+----------¦
¦ CLEAR    ¦ *NOKEY          ¦ Structure or       ¦           ¦         
¦
¦          ¦                 ¦ Variable           ¦           ¦         
¦
+------------------------------------------------------------------------+
 The CLEAR operation sets elements in a structure (record format, data
structure, array, or table) or a variable (field, subfield, or
indicator),
to zero, blank....

Note that when the CLEAR operation is applied to a record-format name,
only output fields in the record format are affected.....

==========================
======= my query =========
==========================
I have a program in which I am using a file as Input/Full procedural, I
am only using one of the files fields as output within the RLU generated
PRTF in my program.  When I do the following:
....
                CLEAR TMISC     <---- Record format name.
        K10     CHAIN FLTMISC           30
....
If my chain is a no hit, this field from the record format above isn't
cleared out.  But if I do this:
....
                CLEAR TMDES6    <---- Individual field within record format.
        K10     CHAIN FLTMISC           30
....            
It is cleared out properly.. What gives?
-- 
''''''''''''''''''''
:-Tim & Dana Truax-:
....................
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