A small band or two allowed (8)
I believe the answer is:
bracelet
'a small band' is the definition.
'bracelet' can be an answer for 'band' (bracelet is a kind of band). I am not certain of the 'a small' bit.
'two allowed' is the wordplay.
'two' becomes 'brace' (brace is a kind of two).
'allowed' becomes 'let' (to let is to allow or permit).
'brace'+'let'='BRACELET'
'or' acts as a link.
Can you help me to learn more?
(Other definitions for bracelet that I've seen before include "Ornamental wristband" , "Ornamental band worn on wrist" , "Arm jewellery" , "Might Bel react badly to this jewellery?" , "Ornament - handcuff (slang)" .)