Set rate limit that's against the clock (4,5)
I believe the answer is:
time trial
'clock' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'set rate limit that's against' is the wordplay.
'set' indicates anagramming the letters (instruction to set the letters).
'that's against' means one lot of letters go next to another.
'rate' after 'limit' is 'limitrate'.
'limitrate' is an anagram of 'TIME TRIAL'.
'the' is the link.
Can you help me to learn more?
(Other definitions for time trial that I've seen before include "Cycling event" , "Race against the clock" , "test" .)