Let a learner relax (5)

I believe the answer is:

lease

'let' is the definition.
('lease' can be a synonym of 'let')

'a learner relax' is the wordplay.
'a learner' becomes 'l'.
'relax' becomes 'ease' (I've seen this before).
'l'+'ease'='LEASE'

(Other definitions for lease that I've seen before include "Let (property)" , "Let; rent" , "Contract of tenure" , "Ghost" , "Summer's has too short a date (Shak.)" .)

I've seen this clue in the Evening Standard.

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