Point to the sailor to catch (3)
I believe the answer is:
nab
'catch' is the definition.
(nab can mean to capture or arrest)
'point to the sailor' is the wordplay.
'point' becomes 'n' (N is an example).
'to the sailor' becomes 'ab' (abbreviation for able seaman).
'n'+'ab'='NAB'
'to' acts as a link.
(Other definitions for nab that I've seen before include "Apprehend" , "Collar (sl.)" , "Cop" , "Seize quickly" , "Catch (thief) (colloq.)" .)