New king in lodge is tall and thin (5)
I believe the answer is:
lanky
'tall and thin' is the definition.
(I've seen this before)
'new king in lodge' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'king' becomes 'K' (chess abbreviation).
'in' is an insertion indicator.
'lodge' becomes 'lay' (I am not sure about this - if you are sure you should believe this answer much more).
'n'+'k'='nk'
'nk' put within 'lay' is 'LANKY'.
'is' is the link.
Can you help me to learn more?
(Other definitions for lanky that I've seen before include "Tall and gangling" , "Awkwardly long and thin" , "Tall and angular" , "Ungracefully tall" , "Far from podgy" .)