Just what I need! Lunchtime traffic (5)
I believe the answer is:
ideal
'just what i' is the definition.
I can't tell whether this definition defines the answer.
'lunchtime traffic' is the wordplay.
'lunchtime' becomes 'I' (one o'clock is I on a clock with Roman numerals).
'traffic' becomes 'deal' (I've seen this in another clue).
'i'+'deal'='IDEAL'
'need' is the link.
Can you help me to learn more?
(Other definitions for ideal that I've seen before include "Very eager (to see)" , "Benchmark" , "Ailed (anag)" , "Coal-mining waste" , "Just perfect, couldn't be better" .)