I had top removed from concrete - perfect (5)
I believe the answer is:
ideal
'perfect' is the definition.
(similar in meaning)
'i had top removed from concrete' is the wordplay.
'i had' becomes 'i'd' (contraction).
'top removed from' means to remove the first letter.
'concrete' becomes 'real' (similar in meaning).
'real' with its first letter removed is 'eal'.
'id'+'eal'='IDEAL'
(Other definitions for ideal that I've seen before include "superb specimen" , "Model of excellance" , "Consummate" , "Optimum" , "Textbook" .)