Nick, on retirement, removing uniform in holiday destination (6)
I believe the answer is:
resort
'holiday destination' is the definition.
(I've seen this before)
'nick on retirement' is the wordplay.
'nick' becomes 'or' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'on' is an insertion indicator.
'retirement' becomes 'rest'.
'or' going inside 'rest' is 'RESORT'.
'removing uniform in' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for resort that I've seen before include "set out differently" , "site for recreation" , "Holiday town" , "Put fresh order" , "Where one may stay in hotel" .)