Dog wise person keeps dry (6)
I believe the answer is:
setter
'dog' is the definition.
(setter is a type of dog)
'wise person keeps dry' is the wordplay.
'wise person' becomes 'seer' (I've seen this before).
'keeps' indicates putting letters inside (inserted letters are kept inside).
'dry' becomes 'tt' (abbreviation for teetotal).
'seer' enclosing 'tt' is 'SETTER'.
(Other definitions for setter that I've seen before include "Street (anag.)" , "puzzle constructor" , "pointer" , "I may pose a problem" , "Dog trained to point at game" .)