Pair allowed in band (8)
I believe the answer is:
bracelet
'band' is the definition.
(bracelet is a kind of band)
'pair allowed' is the wordplay.
'pair' becomes 'brace' ('brace' can be a synonym of 'pair'**).
'allowed' becomes 'let' (I've seen this before).
'brace'+'let'='BRACELET'
'in' is the link.
(Other definitions for bracelet that I've seen before include "Let caber be made into a piece of jewellery" , "Band around the wrist" , "charm?" , "Ornament worn on arm or wrist" , "Wrist, arm adornment" .)