Crack geezer (4)
I believe the answer is:
chap
I believe this is a double definition.
'crack' is the first definition.
('chap' can be a synonym of 'crack')
'geezer' is the second definition.
(thesaurus)
(Other definitions for chap that I've seen before include "Cracked patch (of skin) - gentleman" , "Bloke, fellow" , "Fish" , "we prefer not to have on hand" , "Sore; cheek; man" .)