Look on the initial ball as a high one! (3)
I believe the answer is:
lob
'a high one' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'look on the initial ball' is the wordplay.
'look' becomes 'lo' ('lo' is an archaic exclamation meaning 'look!').
'on' means one lot of letters go next to another.
'the initial' says to take the initial letters.
The first letter of 'ball' is 'b'.
'lo'+'b'='LOB'
'as' acts as a link.
Can you help me to learn more?
(Other definitions for lob that I've seen before include "High shot" , "Tennis stroke" , "Toss" , "High throw or hit" , "Tennis shot" .)