Boy slips all over the place, perhaps (8)
I believe the answer is:
possibly
'perhaps' is the definition.
(I know that perhaps can be written as possibly)
'boy slips all over the place' is the wordplay.
'all over the place' is an anagram indicator.
'boy'+'slips'='boyslips'
'boyslips' anagrammed gives 'POSSIBLY'.
(Other definitions for possibly that I've seen before include "Maybe" , "Perhaps" .)