Numbers with minimal English — something they need to learn about? (5)
I believe the answer is:
tense
'something they need to learn about?' is the definition.
The definition suggests an adverb but the answer is not.
'numbers with minimal english' is the wordplay.
'numbers' becomes 'tens' (ten is a kind of number).
'with' means one lot of letters go next to another.
'minimal english' becomes 'e' (abbreviation. I am not sure about the 'minimal' bit.).
'tens'+'e'='TENSE'
Can you help me to learn more?
(Other definitions for tense that I've seen before include "Charged" , "Nervous or tight" , "Rigid; verb form" , "Nerve-racking" , "Stressful" .)