Clue: US city recalled Hindu festivals (5)
Answer: SALEM
Explanation: Definition: US city
A reversal ('recalled') of MELAS ('Hindu festivals' – the word is used for all sorts of gatherings). There are numerous places in the US with the name Salem, several having the designation 'city'. The clue needs some help (I had the final M, which is enough) to determine to which end the 'recalled' refers.