Pound to fill a poem with it (1,2,4)
I believe the answer is:
a la mode
'with it' is the definition.
(I've seen this before)
'pound to fill a poem' is the wordplay.
I cannot really understand how this works, but
'pound' could be 'l' (abbreviation e.g. Lsd - pounds, shillings, pence) and 'l' is present in the answer.
'a' is present in the answer.
'poem' could be 'ode' (ode is a kind of poem) and 'ode' is found within the answer.
The remaining letters 'am' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for a la mode that I've seen before include "In fashion - served with ice cream" , "Fashionable -- served with ice cream" , "all the rage" , "stewed with veg?" , "In the current fashion" .)