Line taken with infant making incomprehensible sounds (5)
I believe the answer is:
babel
'incomprehensible sounds' is the definition.
(I've seen this before)
'line taken with infant' is the wordplay.
I cannot quite see how this works, but
'line' could be 'el' (el is a kind of line) and 'el' is found in the answer.
The remaining letters 'bab' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'making' is the link.
Can you help me to learn more?
(Other definitions for babel that I've seen before include "Noisy confusion of voices" , "Confusion of speech" , "Confusion of voices in a tower" , "Confusion of sounds" , "This Biblical Tower was very noisy, too many languages" .)