Interesting form of coal pit (7)
I believe the answer is:
topical
'interesting' is the definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I can't see?
'form of coal pit' is the wordplay.
'form of' is an anagram indicator (the letters need to be in another 'form').
'coal'+'pit'='coalpit'
'coalpit' anagrammed gives 'TOPICAL'.
Can you help me to learn more?
(Other definitions for topical that I've seen before include "Current - local - up-to-date" , "Of interest at the present time" , "Up to date" , "Like The Sunday Times" , "Of local interest" .)