Roam about in Holland as usual (6)
I believe the answer is:
normal
'as usual' is the definition.
(I've seen this before)
'roam about in holland' is the wordplay.
'about' indicates an anagram.
'in' indicates putting letters inside.
'holland' becomes 'nl'.
'roam' anagrammed gives 'orma'.
'orma' going into 'nl' is 'NORMAL'.
(Other definitions for normal that I've seen before include "Standard, expected" , "Ordinary, not unusual" , "Ordinary, standard" , "Commonplace" , "Usual - sane" .)