Present fog - the problem with sailor is eloquence (4,2,3,3)
I believe the answer is:
gift of the gab
'eloquence' is the definition.
I don't know anything about this answer so I cannot judge whether it can be defined by this definition.
'present fog the problem with sailor' is the wordplay.
'present' becomes 'gift' (synonyms).
'problem' is an anagram indicator.
'with' is a charade indicator (letters next to each other).
'sailor' becomes 'ab' (abbreviation for able seaman).
'fog'+'the'='fogthe'
'fogthe' with letters rearranged gives 'oftheg'.
'gift'+'oftheg'+'ab'='GIFT OF THE GAB'
'is' acts as a link.
Can you help me to learn more?
(Other definitions for gift of the gab that I've seen before include "Talent of eloquence?" , "Ability to speak persuasively" , "Ability to speak well" , "Ability to talk well" , "Talent for talking" .)