You tend to get more response, if you set down the clue .....
58) Sailor, with a follower, is in prison but has money from North America (7)
The answer you seek is 'money from North America' - a 'slang' word meaning paper money ....
dissecting the cryptic clue:
'Sailor' (2 letter abbreviation) 'with' (+) 'a follower' (i.e. the letter in the alphabet that follows the letter 'a' ) ...
.... you now have 3 letters
'is IN prison' - i.e the above 3 letters are INside a 4 letter word meaning 'prison' ..... not a word associated with the UK, but American where they might put their most fearsome prisoners!!)
{slang words for american paper money often reflect the colour of such paper money - e.g the US one dollar bill is green) .....
finally .... the answer is also the name of a healthy vegetable, where you eat the leaves!!}