Infant beginning to love making commotion (5)
I believe the answer is:
babel
'commotion' is the definition.
(I've seen this before)
'infant beginning to love' is the wordplay.
'infant' becomes 'babe' (synonyms).
'beginning to' says to take the initial letters.
The initial letter of 'love' is 'l'.
'babe'+'l'='BABEL'
'making' is the link.
(Other definitions for babel that I've seen before include "This Biblical Tower was very noisy, too many languages" , "pandemonium" , "Confusion of noise" , "Noisy Tower in the Bible" , "Biblical tower location" .)