Large singer dressed in Scots headgear (11)
I believe the answer is:
glengarries
'scots headgear' is the definition.
'glengarries' can be an answer for 'headgear' (I've seen this before). I am not certain of the 'scots' bit.
'large singer dressed' is the wordplay.
'dressed' is an anagram indicator ('dress' can mean 'prepare').
'large'+'singer'='largesinger'
'largesinger' is an anagram of 'GLENGARRIES'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for glengarries that I've seen before include "Scotsmen's attire" , "Headgear" .)