Frank has broken seat so they are standing (10)
I believe the answer is:
candidates
'they are standing' is the definition.
The definition suggests an adverb but the answer is not.
'frank has broken seat' is the wordplay.
'frank' becomes 'candid' (synonyms).
'has' means one lot of letters go next to another.
'broken' indicates an anagram.
'seat' is an anagram of 'ates'.
'candid'+'ates'='CANDIDATES'
'so' acts as a link.
Can you help me to learn more?
(Other definitions for candidates that I've seen before include "Entrants" , "those awaiting interview?" .)