SI units to get unknown resistance countered by birds flying around (6)
I believe the answer is:
henrys
'si units' is the definition.
The definition and answer can be both quantities as well as being plural nouns.
Perhaps there's a link between them I don't understand?
'unknown resistance countered by birds flying around' is the wordplay.
'unknown' becomes 'y' (algebra).
'resistance' becomes 'r' (abbreviation).
'countered' says the letters should be written backwards (I've seen 'counter' mean this).
'by birds' becomes 'hens' (hen is a kind of bird. I am not sure about the 'by' bit.).
'flying around' means one lot of letters goes inside another.
'y'+'r'='yr'
'yr' written backwards gives 'ry'.
'ry' going within 'hens' is 'HENRYS'.
'to get' is the link.
Can you help me to learn more?