Can having fun possibly be unpleasant? (7)

I believe the answer is:

painful

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'unpleasant?' is the definition.
(similar in meaning)

'can having fun possibly' is the wordplay.
'can' becomes 'pail' (I am not sure about this - if you are sure you should believe this answer much more).
'having' indicates putting letters inside.
'possibly' indicates an anagram.
'fun' with letters rearranged gives 'nfu'.
'pail' placed around 'nfu' is 'PAINFUL'.

'be' acts as a link.

Can you help me to learn more?

(Other definitions for painful that I've seen before include "Embarrassing" , "Inflamed" , "Agonising" , "Wretched" , "Hurting" .)

I've seen this clue in The Hindu.

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