New record tends to be welcomed by clubs after hours (5,5)
I believe the answer is:
clean slate
'new record' is the definition.
'clean slate' can be an answer for 'record' (I have seen 'good record' mean 'clean slate' so perhaps 'record' could also mean 'clean slate'). I am unsure of the 'new' bit.
'tends to be welcomed by clubs after hours' is the wordplay.
'tends' becomes 'leans' ('lean' can be a synonym of 'tend').
'to be welcomed by' indicates putting letters inside (letters welcomed inside).
'clubs' becomes 'c' (abbreviation used in card games such as bridge).
'after hours' becomes 'late' (I've seen this in another clue).
'c'+'late'='clate'
'leans' going within 'clate' is 'CLEAN SLATE'.
Can you help me to learn more?
(Other definitions for clean slate that I've seen before include "A record without dishonour" , "new start" , "good record" , "making a fresh start?" .)