A soldier with small feet is present (4)
I believe the answer is:
gift
'is present' is the definition.
(I've seen this before)
'a soldier with small feet' is the wordplay.
'a soldier' becomes 'GI' (term for US soldier).
'with' is a charade indicator (letters next to each other).
'small feet' becomes 'ft' (I've seen this in other clues. I am not sure about the 'small' bit.).
'gi'+'ft'='GIFT'
Can you help me to learn more?
(Other definitions for gift that I've seen before include "Present or special talent" , "Special aptitude - present" , "Donation" , "A present or gratuity" , "Endowment" .)