Crossword Genius

Second record is hard work (4)

Ross

I believe the answer is:

slog

'is hard work' is the definition.
(I've seen this before)

'second record' is the wordplay.
'second' becomes 's' (common abbreviation).
'record' becomes 'log' (log is a kind of record).
's'+'log'='SLOG'

(Other definitions for slog that I've seen before include "Work doggedly" , "big hit" , "Very tiring work" , "almighty wallop" , "Long tedious task" .)

I've seen this clue in The Sun.
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