It has around ten numbers and fourteen lines (6)
I believe the answer is:
sonnet
'fourteen lines' is the definition.
'sonnet' can be an answer for 'lines' (poem of 14 lines). I'm not certain of the 'fourteen' bit.
'it has around ten numbers' is the wordplay.
'it' becomes ''t' (abbreviation. e.g. in 'tis).
'has' is a charade indicator (letters next to each other).
'around' says the letters should be written backwards.
'ten' becomes 'en' (I am not sure about this - if you are sure you should believe this answer much more).
'numbers' becomes 'nos' ('no' is an abbreviation for number).
'en'+'nos'='ennos'
'ennos' in reverse letter order is 'sonne'.
't' put after 'sonne' is 'SONNET'.
'and' is the link.
Can you help me to learn more?
(Other definitions for sonnet that I've seen before include "Short poem with 14 lines" , "Sent on the verse form" , "Tonnes (anag.)" , "Poem of 14 lines - Shakespeare wrote lots" , "Form of poem" .)