Indefinite number heading close to me? I'll object (5)
I believe the answer is:
nimby
'i'll object' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'indefinite number heading close to me?' is the wordplay.
'indefinite number' becomes 'n' (mathematical symbol).
'heading' means one lot of letters go next to another (some letters go in front of or head others).
'close to' becomes 'by' (close by).
'me?' becomes 'im' (I can't justify this - if you can you should give a lot more credence to this answer).
'by' put after 'im' is 'imby'.
'n'+'imby'='NIMBY'
Can you help me to learn more?
(Other definitions for nimby that I've seen before include "Somewhere else and I might not object!" , "Self-interested objector to local development" , "I don't want it near where I live" , "One objecting to local developments" , "Someone prepared to have something built but only in another neighbourhood" .)