Frank is enthusiastic when husband gets to the top? (6)
I believe the answer is:
earthy
'frank' is the definition.
(thesaurus)
'when husband gets to the top?' is the wordplay.
'when' becomes 'e' (I've seen this in other clues).
'husband' becomes 'h' (abbreviation).
'gets' means one lot of letters goes inside another.
'to the top?' becomes 'arty' (I can't explain this - if you can you should give a lot more credence to this answer).
'h' put into 'arty' is 'arthy'.
'e'+'arthy'='EARTHY'
'is enthusiastic' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for earthy that I've seen before include "Coarse, vulgar" , "Coarse as humour may be" , "Unenthusiastic" , "Head covering" , "Consisting of soil" .)