Where the gang's at a loose end? (5)
I believe the answer is:
crewe
'where' is the definition.
The definition suggests a singular noun which matches the answer.
'gang's at a loose end?' is the wordplay.
'gang' becomes 'crew' (synonyms).
'at' is a charade indicator (letters next to each other).
'end?' suggests the final letters (I've seen 'end of' mean this).
The last letter of 'loose' is 'e'.
'crew'+'e'='CREWE'
'the' is the link.
Can you help me to learn more?
(Other definitions for crewe that I've seen before include "Cheshire town of railway fame" , "Cheshire rail junction" , "Ace wanderer lax (anag)" , "Cheshire town long associated with railways" , "Famous railway town" .)