“Awful creeps”, one put in, “is absolutely right” (7)
I believe the answer is:
precise
'absolutely right' is the definition.
'precise' can be an answer for 'right' ('precise' can be similar in meaning to 'right'). I'm unsure of the 'absolutely' bit.
'awful creeps one put in' is the wordplay.
'awful' indicates an anagram.
'one' becomes 'i' (Roman numeral).
'put in' means one lot of letters goes inside another.
'creeps' is an anagram of 'precse'.
'precse' placed around 'i' is 'PRECISE'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for precise that I've seen before include "Specific" , "'Exact, accurate (7)'" , "Recipes (anag.)" , "Exact like recipes" , "Highly accurate and sharply exact" .)