Clue: Start to tease female with gold among a lot dressed excessively (2,1,5)
Answer: TO A FAULT
Explanation: Definition: excessively
 **1st letter of**(Start to) "tease" + { [ F(abbrev. for "female") **plus**(with) AU(symbol for the chemical element, gold) ] **contained in**(among) **anagram of**(… dressed) A LOT }.